​S
STUPID - STUPIDNESS

STUPID - adjectives
• ADDLE stupid ...Bk1898 Eng. dial.
• ADDLE-BRAINED confused, muddled, stupid ...1866
• ADDLE-HEADED confused, muddled, stupid ...a1670
• ADDLE-PATED confused, muddled, stupid, doltish, thick-headed ...1630
• AGGERHEADED dull, stupid ...Bk1898 Eng. dial.
• AIRBRAINED stupid, silly ...Amer. sl.
• AIRHEADED stupid, giddy ...Bk2000 Amer. sl.
• AMOEBA-BRAINED stupid ...a1967 Amer. sl.
• ANSERINE stupid, foolish, silly 
• ANSEROUS as stupid as a goose; silly, foolish ...1826
• ASINARY † belonging to an ass; having the qualities characteristic of an ass; asinine, obstinate, stupid, doltish ...1731
• ASSHOLE stupid, irritating, contemptible, despicable ...1888 US sl.
• AUVISH silly, dull, stupid, clownish, mischievous ...1819 Eng. dial.
• AWF-STRUCKEN silly, dull, stupid, clownish, mischievous ...Bk1898 Eng. dial.
• AWVISH silly, dull, stupid, clownish, mischievous ...1819 Eng. dial.
• BALD-HEADED stupid, foolish ...L19 US Black sl.
• BATTLE-HEADED. stupid ...Bk1898 Eng. dial.
• BAZED stupefied; stupid ...Bk1911 Sc.
• B.B.-BRAINED stupid ...1960s US sl.
• BEDAFT † foolish, stupid ...1572
• BEDWADDLED confused, distressed, bewildered, stupid ...1790 Eng. dial.
• BEEF-BRAINED † thick-headed, stupid ...1627
• BEEF-WITTED thick-headed, stupid, dull in wits, doltish ...1606
• BEETLE-HEADED dull, stupid ...1553-87
• BEHIND THE DOOR WHEN BRAINS WERE GIVEN OUT stupid ...1969 Aust. sl.
• BESOM-HEADED weak-minded, foolish, stupid ...1864
• BESOM-SCAUPED weak-minded, stupid ...Bk1898 Eng. dial.
• BETOTLED confused, distressed, bewildered, stupid ...1790 Eng. dial.
• BETOTTLED confused, distressed, bewildered, stupid ...1790 Eng. dial.
• BEWATTLED confused, distressed, bewildered, stupid ...1790 Eng. dial.
• BIGOTED stupid, self-willed (without reference to any religious intolerance) ...Bk1898 Eng. dial.
• BIRD-BRAINED foolish, slow-witted, unintelligent, stupid ...1922 sl.
• BIRDTURD stupid; obnoxious; lousy; worthless ...Bk2006 US sl.
• BLAIT stupid, easily imposed on ...Bk1911 Sc.
• BLUFFLE-HEADED stupid-looking ...Bk1911 Sc.
• BOFFLED baffled, confused, rendered stupid ...1876 Eng. dial.
• BOJANGLING acting stupid ...Bk2006 US sl.
• BONE-HEADED thick-headed; stupid ...1903 US colloq.
• BOOF-HEADED gullible; foolish; stupid ...c1930 Aust. sl.
• BOTHER-HEADED stupid, thick-headed, muddled ...1872
• BRAIN-DEAD feeble-minded, stupid ...1981 sl., orig. US
• BRICK SHORT OF A LOAD, A simple-minded, lacking in common sense or intelligence, stupid, slightly crazy ...1983 sl.
• BRIGHT AS A TWO-WATT BULB stupid ...Bk1999 Aust. sl.
• BUFFLE-BRAINED stupid, foolish ...1900 Amer. dial.
• BURBLE-HEADED stupid, confused ...19C Sc.
• BURIED IN A NAPKIN asleep, stupid ...19C sl.
• BUZZARD senseless, stupid ...1592
• BUZZARDLY † stupid, senseless ...1561
• CABBAGE-HEADED having a large, round head; stupid ...1846 Amer. sl.
• CAKE stupid, foolish, daft ...L19 sl.
• CAKEY stupid, foolish, daft; half-witted ...L19 sl.
• CAKY weak of intellect, silly ...1879 Eng. dial.
• CALFISH stupid, untrained, immature ...L16
• CALSHIE crabbed, ill-tempered, surly ...1873 Sc.
• CALVISH doltish, stupid ...1570
• CEMENT-HEADED stupid, foolish ...1962 Amer. sl.
• CHUCKLE-HEADED stupid, foolish ...M18
• CHUMP stupid, gullible ...20C sl.
• CHUMP-ASS stupid, gullible ...20C sl.
• CHUMPISH stupid, gullible ...20C sl.
• CLAY-BRAINED dull, doltish; stupid; with brains made of clay ...1596
• CLODPOLISH stupid ...20C US colloq.
• CLOD-SKULLED stupid; oafish ...18C Brit. colloq.
• CLUCKY stupid; oafish ...20C US colloq.
• CLUELESS foolish, slow-witted, unintelligent, stupid ...1943 sl.
• COB not cool; stupid ...20C teen & high school sl.
• CORKY stupid, foolish ...2000s US Black sl.
• CORNBALL stupid; corny ...Bk2006 US sl.
• COUPLE OF PIES SHORT OF A GRAND FINAL, A stupid ...Bk1999 Aust. sl.
• CRACKBRAINED stupid; ridiculous ...Bk2006 US sl.
• CRAZY AS A TWO-BOB WATCH extremely stupid, mad ...1963 Aust. sl.
• CULVER-HEADED thick-headed, stupid ...19C Eng. dial.
• CUNNING AS A DEAD PIG stupid ...1705 colloq.
• DADLESS useless, stupid ...Bk1900 Eng. dial.
• DAFF stupid, dull, idiotic ...Bk1900 Eng. dial.
• DAFT silly, stupid, foolish, half-witted, mad ...c1325 Sc., Ireland, and Eng. dial.
• DAFT AS A BRUSH, AS extremely stupid; very silly; crazy ...1945 sl., orig. Eng. dial.
• DAFTISH somewhat silly, foolish, or stupid; somewhat slow of intellect, in some degree deranged ...1825 Sc. & Eng. dial.
• DAGGY stupid, unpleasant ...20C Aust. sl.
• DAISKET stupid, dazed, slow ...1880 Sc.
• DAKES-HEADED stupid, dull ...1893 Eng. dial.
• DAMFOOL damnably foolish; silly; stupid and irritating ...c1895 colloq.
• DAMISHT stupid, silly ...Bk1900 Sc.
• DAMMERTIT stupid ...Bk1900 Sc.
• DAMN-FOOL damnably foolish; silly; stupid and irritating ...19C colloq.
• DAMP foolish, stupid; crazy ...L19 sl.
• DANGFOOL stupid and irritating ...L19 sl.
• DARK stupid, slow-witted, ignorant ...a1660 sl.
• DARNFOOL wretched, nasty; silly; stupid and irritating ...1780s
• DASTARDLY † inert of mind or action; stupid, dull ...1567
• DAUPET silly, stupid, foolish, imbecile ...1788 Sc.
• DAUSEY stupid, silly, bewildered; dull, inactive, doltish ...1889 Sc. & Eng. dial.
• DAWPIT silly, stupid, foolish, imbecile ...1788 Sc.
• DAWSIE stupid, silly, bewildered; dull, inactive, doltish ...1889 Sc. & Eng. dial.
• DAWSY stupid, silly, bewildered; dull, inactive, doltish ...1889 Sc. & Eng. dial.
• DEAD having no knowledge; exceedingly stupid; dense ...1900s sl.
• DEAD-ALIVE dull, inactive, spiritless; stupid ...1591 chiefly US
• DEAD-AND-ALIVE dull, inactive, spiritless, stupid ...a1862 chiefly US
• DEADASS very boring, feeble, or very stupid ...20C Amer. sl.
• DEAD-ASS STUPID completely stupid ...1985 Amer. sl.
• DEAD FROM THE NECK BOTH WAYS exceedingly stupid ...1924 Amer. sl.
• DEAD FROM THE NECK UP exceedingly stupid ...1911 Amer. sl.
• DEAD-LIVERED dead-alive; stupid, dull, sluggish ...Bk1900 Eng. dial.
• DEAD-TO-THE-NECK exceedingly stupid ...1952 Amer. sl.
• DEAF † dull, stupid; absurd ...c1440
• DEASKED adj. besotted; stupid, bewildered ...B1900 Sc.  
• DESKIT stupid; bewildered ...B1900 Sc.
• DIK stupid ...1978 S. Afr.
• DILLED driven stupid ...1851 Eng. dial.
• DIM foolish, slow-witted, unintelligent, stupid ...1892 sl.
• DIM-WITTED foolish, slow-witted, unintelligent, stupid ...1940 sl.
• DINGBATS stupid, foolish ...1950 Aust. sl.
• DINSH dull, stupid ...Bk1900 Eng. dial.
• DIPSHIT pert. to someone or something obnoxious, stupid, or offensive ...Bk2006 US sl.
• DIZZY stupid; scatterbrained ...Bk2006 US sl.
• DOF stupid ...S. Afr. colloq.
• DON'T KNOW ENOUGH TO POUND SAND IN A RAT-HOLE very stupid ...Bk1913-17 Amer. dial.
• DOOFLESS idiotic, stupid, dull ...1970s US sl.
• DOPEY, DOPY foolish, slow-witted, unintelligent, stupid ...1895 orig. US
• DORBELISH, DORBELLISH stupid, awkward, clumsy ...1847 Eng. dial.
​• DORBELLICAL † stupid, very awkward or clumsy ...1592 nonce word
• DORKY stupid ...20C teen & high school sl.
• DOWFART dull, stupid ...E18 Sc. arch.
• DOZEY, DOZY foolish, slow-witted, unintelligent, stupid ...1924 Brit. sl.
• DROOLY stupid, unpopular ...1940s US sl.
• DULL AS A BEETLE dull, stupid ...1520
• DULT † dull, stupid ...a1250
• DUMB foolish, slow-witted, unintelligent, stupid ...1823 sl.
• DUMB AS A BEETLE dull, stupid ...1566
• DUMB AS A DEEP SEA OYSTER very dull or stupid ...Bk1913 Amer. dial.
• DUMB AS A MUD FENCE very stupid ...2004 US sl.
• DUMB-ASS stupid, foolish ...1957 US sl.
• DUMB-ASSED foolish, slow-witted, unintelligent, stupid ...1957 US sl.
• DUMB AS TWO SHORT PLANKS said of someone who is very stupid ...1989 Can. sl.
• DUMBSHIT stupid ...1967 US sl.
• DUMBSKI stupid; dumb ...Bk2006 US sl.
• DUMMEL stupid, dull, slow ...1878 Eng. dial.
• DUMPISH † dull, stupid, slow-witted; inactive, inert, spiritless; destitute of sensation; abstracted, insensible to outward things; dull, uninteresting ...1545
• DUNCELY slow to learn or understand; stupid, unintelligent, dim-witted ...1757
• DUNCEY stupid, unintelligent; lacking in or incapable of learning ...1743
• DUNCH † slow to learn or understand; lacking in intelligence; stupid, dull ...1825 colloq.
• DUNCICAL * like a dunce or blockhead; stupid, dull-witted, doltish ...1588
• DUNCIFIED slow to learn or understand; stupid, uncomprehending ...c1600
• DUNCING † behaving like a dunce; stupid, foolish ...1584
• DUNCISH slow to learn or understand; stupid, unintelligent ...1805
• DUNDERHEADED stupid, foolish, slow-witted ...1692
• DUNDERING stupid, foolish; blundering ...1840
• DUNSTICAL * slow to learn or understand; stupid, dull, unintelligent, dim-witted ...1592
• DUNT stupefied, numbed, dazed; stupid, foolish, dizzy, muddle-headed ...1787 Eng. dial.
• DUNTY stupid, muddle-headed ...1960 Eng. dial.
• DUSI † foolish, stupid ...c1175
• EAT UP WITH THE DUMB ASS very stupid ...1984 US sl.
• EROS AND CUPID stupid ...1990s rhyming sl.
• FAT-BRAINED foolish, stupid ...L18 sl.
• FAT-HEADED dull, stupid ...c1510
• FATUOUS foolish, vacantly silly, stupid, besotted, infatuated ...1633
• FAT-WITTED of slow wit, dull, thick-headed, stupid ...1596
• FEW PICKLES SHORT OF BARREL, A stupid; crazy, eccentric ...1941 sl.
• FEW SANDWICHES SHORT OF A PICNIC, A stupid; crazy, eccentric ...20C sl.
• FISH foolish, stupid ...1980 Amer. dial.
• FLATHEADED stupid ...Bk2006 US sl.
• FLOCK-PATED † silly, stupid, foolish; giddy; having a head or brains like wool ...?1640
• FROST-BRAINED † stupid, dull ...1592
• FUZZ-BRAINED stupid ...1969 US sl.
• GACKY stupid, odd ...2000s sl.
• GALE-HEADED stupid, heavy ...1810 Eng. dial.
• GARRICK awkward, stupid ...B1900 Eng. dial.
• GAY not cool, totally stupid ...20C teen & high school sl.
• GLAIKIT stupid, careless, foolish ...1889 Sc.
• GOOSEY foolish, stupid. silly, light-headed, witless ...1919 Amer. dial.
• GORMIN' clumsy, stupid ...Bk1913-17 Amer. dial.
• GORMLESS foolish, slow-witted, unintelligent, stupid ...c1746 sl.
• GROUT-HEADED † thick-headed, stupid ...1578 obs. exc. Eng. dial.
• GUMP-HEADED stupid, foolish, awkward ...1722 Amer. dial.
• GUPPY foolish, stupid, silly ...c1930 sl.
• HAGGIS-HEADED soft-headed, foolish, stupid ...1715 Sc.
• HALF-FOOL stupid, ignorant, half-witted ...Bk1905 Eng. dial.
• HALF-HARD stupid ...20C Brit. sl.
• HALF-HEADED half-intelligent; stupid, deficient in intellect ...1621-31
• HALF-MAST stupid ...20C Brit. sl.
• HALFPENNY SHORT OF A SHILLING, A lacking in common sense or intelligence; mentally deficient; slightly crazy ...1939
• HALF-WITTED not having all one's wits; imbecile; foolish; stupid ...1712
• HAME-HEADED stupid ...1937 Amer. dial.
• HAMMER-HEADED dull in intellect; stupid ...1552
• HAPENNY SHORT OF A SHILLING simple-minded, lacking in common sense or intelligence, stupid, slightly crazy ...1939 sl.
• HAREBRAIN stupid and heedless ...M16
• HARE-BRAINED stupid and heedless, reckless; rash, wild, mad ...1548
• HAWFISH silly, dull, stupid, clownish, mischievous ...1819 Eng. dial.
• HAWKED stupid, foolish ...1790 Sc.
• HEADLESS of things, actions, etc.: senseless, stupid ...1586
• HEAVY † slow of understanding, inapprehensive, dull, stupid ...c1300
• HEAVY-HEADED dull, stupid ...1590
• HEXED stupid, confused ...1990s sl.
• IDLE-MINDED slow-witted; wandering in mind; dull and stupid ...1967 Amer. dial.
• IGNORANT AS PADDY'S PIG very stupid ...1974 NZ sl.
• INSIPIENT * void of wisdom, understanding, or intellect; unwise, foolish, stupid ...1528
• IVORY-DOMED stupid, foolish ...1932 US sl.
• JOBBERNOWL stupid, dunderheaded ...1828 colloq.
• JUGHEADED blockheaded; doltish, stupid ...1939 Amer. sl.
• KNOCK-SOFTLY stupid, foolish ...1887 Eng. dial.
• KNOW-NOTHING very ignorant; stupid ...a1825
• LACK-THOUGHT wanting or lacking thought; foolish, stupid, vacant ...1829
• LAKES (OF KILLARNEY) mad, crazy, stupid ...1934 UK imperfect rhyming sl. for 'barmy'
• LAKEY, LAKIE mad, crazy stupid ...1934 UK imperfect rhyming sl. (Lakes of Killarney)
• LAME socially unsophisticated; naive; 'square'; hence, easily imposed upon; stupid; inept; ineffectual; incompetent; unaware; inexperienced ...1935 US sl., esp. Black usage
• LAME-BRAINED stupid, doltish ...1922 US sl.
• LEAN-WITTED silly, stupid, foolish; having little sense or shrewdness ...1593
• LEATHER-BRAINED stupid ...20C US colloq.
• LEATHER-HEADED stupid, foolish, slow-witted ...a1668
• LEFT-WITTED * dull, stupid, foolish, silly ...1616
• LIGHT stupid ...1967 US Black sl.
• LOBBERHEADED stupid ...20C US colloq.
• LOGGEREDY-HEADED stupid, doltish, dull; stubborn ...1964 Amer. dial.
• LOGGERHEADED stupid, dull, doltish; stubbornly at odds ...1806 Amer. dial.
• LOG-HEADED stupid, dull, doltish; stubbornly at odds ...1889 Amer. dial.
• LOGY dull, stupid ...1899 Amer. dial.
• LOLO insane, crazy; foolish, dull, stupid ...1938 Hawaii
• LONG-EARED stupid ...1910s sl.
• LOOBY clumsy, awkward, doltish, stupid ...1953 Amer. dial.
• LUBBERLY stupid ...M16
• LUNCH stupid, foolish, crazy ...1960s sl.
• LUNCHBUCKET stupid, dull, uninspiring ...1950s US sl.
• LUNCHED-OUT dazed, unaware, stupid ...1970s US sl.
• LUNCHING crazy, stupid ...1990s sl.
• LUNCHY dull, stupid, absent-minded ...1960s US college sl.
• LUNKY stupid ...1940s US sl.
• MAD AS A BRUSH crazy, stupid ...1945 UK sl.
• MAFFLING blundering, clumsy, foolish, stupid ...Bk1905 Eng. dial.
• MAWMSEY sleepy, stupid, esp. from want of rest or from over-drinking ...1879 Eng. dial.
• MAZLING stupid, foolish, confused ...1885 Eng. dial.
• MEAT-HEADED foolish, slow-witted, unintelligent, stupid ...1949 sl., chiefly US
• MELL-HEADED large and square-headed; stupid ...Bk1905 Eng. dial.
• MIZZLE-WITTED mentally dull, witless, stupid ...1935 Amer. dial.
• MONG stupid, dull ...1970s sl.
• MONGIE dull, stupid ...c1975 teen sl.
• MONGISH stupid ...1980 teen sl.
• MONGY stupid, dull ...1970s sl.
• MOSSY dull, stupid ...c1595 jocular
• MUDDY-BRAINED stupid, dull-witted; confused in mind ...1634
• MULLET-HEADED foolish, slow-witted, unintelligent, stupid ...1857 US sl.
• MUSH-BRAINED stupid; sentimental; nonsensical ...1980s sl.
• MUSH-FACED stupid, foolish ...1910s sl.
• MUTTON-HEADED foolish, slow-witted, unintelligent, stupid ...1768 sl.
• NAIL-HEADED stupid, doltish ...1936
• NARROW stupid, foolish ...Bk1902 sl.
• NEEP-HEADED stupid, dull ...1844 Sc.
• NEIP-LIKE dull, stupid ...1897 Sc. 
• NINNY-NONNY stupid, foolish, weak-minded, childish ...Bk1865 Eng. dial.
​• NOT ENOUGH SENSE TO CARRY GUTS TO A BARREL ignorant, stupid ...1967 Amer. dial.
• NOT ENOUGH SENSE TO CARRY GUTS TO A BEAR ignorant, stupid ...1914 Amer. dial.
• NOT ENOUGH SENSE TO EAT PEAS OUT OF A BOTTLE said of one who seems very stupid ...1970 Amer. dial.
• NOT ENOUGH SENSE TO GO TO MILL stupid ...1969 Amer. dial.
• NOT ENOUGH SENSE TO LAP ALUM AND DROOL very stupid, ignorant ...1969 Amer. dial.
• NOT ENOUGH SENSE TO LEAD A GOOSE TO WATER stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO TOTE GUTS TO A BEAR ignorant, stupid ...1960 Amer. dial.
• NOT HAVE ALL ONE'S BUTTONS deficient in intellect; stupid ...1860 sl.
• NOT KNOW ANY MORE THAN ADAM'S OFF-OX ignorant; stupid ...1978 Amer. dial.
• NOT KNOW AS MUCH AS A LAST YEAR'S BIRD NEST very stupid, ignorant ...1966 Amer. dial.
• NOT KNOW ONE'S ARSE FROM ONE'S ELBOW stupid ...Bk1999 Aust. sl.
• NOT KNOW SIC 'EM very ignorant or stupid ...1907 Amer. dial.
• NOT THE FULL QUID stupid, crazy, eccentric ...1944 Aust. & NZ sl.
• NUMB dull, stupid, dumb; clumsy; not very alert or unaware ...1966 Amer. dial.
• NUMBER THAN A HAKE stupid ...1979 Amer. dial.
• NUMB-HEADED stupid, dull ...1856 Amer. dial.
• NUT mad, crazy, stupid, eccentric ...1906 colloq.
• NUTTY AS A FRUITCAKE very silly or stupid ...Bk2006 US sl.
• OAFING stupid, foolish ...Bk1905 Eng. dial.
• OAF-LOOKING having a look of stupidity ...Bk1905 Sc.
• OAF-ROCK'D half-witted, stupid, foolish, silly ...Bk1905 Eng. dial.
• OBSTUPEFACT †* stupefied; stupid ...1601
• OFF ONE'S KNACKERS insane, stupid ...2000s sl.
• ONE SANDWICH SHORT OF A PICNIC simple-minded, lacking in common sense or intelligence, stupid, slightly crazy ...1985
• ONE SPARK PLUG SHORT OF AN ENGINE lacking in common sense or intelligence; mentally deficient; slightly crazy ...1996
• PADDY AND MICK stupid ...20C UK rhyming sl. for 'thick'
• PADDY QUICK stupid ...M19 rhyming sl. for 'thick'
• PAINT stupid; time-wasting ...2000s US Black sl.
• PIG-IGNORANT extremely stupid or uneducated ...1956 colloq.
• POINTY-HEADED stupid; idiotic ...1968 Amer. sl.
• PORANGI mad, eccentric, stupid ...M19 NZ (Maori)
• POT-HEADED stupid ...1930 Amer. dial.
• RAATID furious; very angry; stupid ...1940s W. Indies. & UK Black sl.
• RAM-HEADED stupid, thick-headed, dull ...1813
• RAMISED witless, stupid ...a1838 Sc.
• RAMISHED witless, stupid ...a1838 Sc.
• RAM-SKULLED thick in the skull, stupid, dense ...1793 Sc.
• RATTLE-BRAINED talkative; flighty; harebrained; silly; stupid; prone to confusion; foolish; unable to concentrate ...1868 Sc.
• RATTLE-HEADED empty-headed, stupid; foolish and noisy; talkative, chattering, giddy, flighty, hare-brained ...1647
​• SACKLESS lacking common sense; silly; foolish; stupid; thoughtless; useless, awkward ...1878 Sc. & Eng. dial.
• SAD AS ANY MALLET, AS dull, stupid ...1645
• SAGGER-YEDDED stupid, foolish ...Bk1904 Eng. dial.
• SAM-SODDEN 'half-baked', stupid ...1891 Eng. dial.
• SAM-ZODDEN stupid, half-baked ...1891 Eng. dial.
• SAM-ZODY stupid, soft ...1889 Eng. dial.
• SAM-ZOED stupid, soft ...Bk1904 Eng. dial.
• SANDWICH SHORT OF A BISCUIT, A not completely sane, stupid ...1992 UK sl.
• SAP-HEADED foolish, silly, stupid, witless ...1665
• SAPPY foolish, stupid ...M17 sl.
• SART-AND-FAIR stupid, senseless, idiotic ...1746 Eng. dial.
• SAWDUST-BRAINED stupid; block-headed ...E20 US sl.
• SAWNEY foolish, stupid, weak; foolishly sentimental ...1894 Eng. dial.
• SCHLEPPY awkward, clumsy, stupid ...1970s US sl.
• SEVERAL BANANAS SHORT OF A MILKSHAKE lacking in common sense or intelligence; mentally deficient; slightly crazy ...1992
• SHADY stupid, dense ...M19 sl., orig. university
• SHIT-BRAINED stupid, brainless ...1970s sl.
• SHORT OF A SHEET crazy; mentally deficient; stupid ...B1900 sl.
• SHORT OF A SHEET OF BARK lacking in common sense or intelligence; mentally deficient; slightly crazy ...1885
• SHORT OF NUMBERS IN THE UPPER HOUSE foolish, stupid ...Bk1999 Aust. sl.
• SHORT OF THE FULL QUID lacking in common sense or intelligence; mentally deficient; slightly crazy ...1960
• SICK silly, stupid; extremely eccentric; mad ...20C Aust. sl.
• SILLY-ARSE stupid, foolish ...1910s sl., chiefly US
• SILLY AS A BAG extremely silly or stupid ...1930s Aust. & NZ sl.
• SILLY AS A HATFUL OF WORMS very silly or stupid ...1950s sl., orig. Aust.
• SILLY AS A TWO-BOB WATCH extremely stupid ...1954 Aust. sl.
• SILLY AS A WET HEN extremely foolish, silly, or stupid ...1980s NZ sl.
• SILLY AS A WHEEL extremely foolish,  silly or stupid ...1950s Aust. sl.
• SILLY AS A WOOLWORTH'S WATCH extremely silly or stupid...1940s Aust. sl.
• SILLY-ASS stupid, foolish ...1910s sl., chiefly US
• SILLY-ASSED stupid, foolish ...1910s sl., chiefly US
• SILLY-BORN stupid, foolish ...1940s sl.
• SIX BRICKS SHORT OF A LOAD lacking in common sense or intelligence; mentally deficient; slightly crazy ...1960
• SKIT-BRAINED stupid; contemptible ...1553
• SOFT-ARSED stupid, dull, half-witted ...1999 UK sl.
• SOFT-HEADED feeble-minded; stupid; simple ...colloq.
• STOCKISH stupid or dull
• STULTY †* foolish, stupid ...1387-8
• SUMPHISH stupid ...1728 Sc. & N. Eng. dial.
• TACO (derogatory) inhabited by or characteristic of Mexicans; cheap; stupid; lazy ...1968 Amer. dial.
• TACOU foolish, stupid ...20C W. Indies sl.
• TAIVERT stupid, foolish, muddle-headed, slow-witted, half-witted ...1818 Sc.
• TAKE YOUR PICK stupid, foolish ...1990s rhyming sl. for 'thick'
• TAVERT stupefied with drink; stupid, muddle-headed, slow-witted, half-witted ...1818 Sc.
• THICK foolish, slow-witted, unintelligent, stupid ...a1800 sl.
• THICK AS PIGSHIT very stupid ...1999 UK sl.
• THICK AS TWO SHORT PLANKS very stupid ...1984 UK sl.
• THICK IN THE HEAD stupid, dull, slow of comprehension ...1871 Sc.
• THICK-LISTED dull, stupid ...1777 Eng. dial.
• THORTY thoughtless, half-witted, stupid ...1895 Eng. dial.
• THREE POTS SHORT OF A SHOUT stupid ...Bk1999 Aust. sl.
• TIMBER-HEADED wooden-headed, stupid, dense or obtuse in intellect ...1666
• TINNY SHORT OF A SIX-PACK of lower than average intelligence ...Bk1999 Aust. sl.
• TWO APPLES SHORT OF A BISCUIT not completely sane, crazy, stupid ...1992 UK sl.
• TWO BRICKS SHORT OF A LOAD stupid; crazy, eccentric ...20C sl.
• UNASINOUS agreeing in stupidity; displaying ignorance or foolishness by all ...1656
• UNCUNNING ignorant, stupid ...Bk1905 Eng. dial.
• UNGAIN disagreeable; intractable, troublesome; unsteady, wild; stupid ...1895 Eng. dial.
• UP AGAINST THE WALL foolish, stupid ...1960s US college sl.
• VEGETABLE brainless; very stupid ...1970s US college sl.
• WAFF of persons: feeble in body or mind, weak, exhausted, spiritless, stupid, ineffective ...1822 Sc.
• WAFF-LIKE of persons: feeble in body or mind, weak, exhausted, spiritless, stupid, ineffective ...1822 Sc.
• WANTING IN THE UPPER STORY stupid ...1885 sl.
• WOMBAT-HEADED stupid, fat-headed ...1971 Aust. sl.
• YARRA mad, insane, stupid, eccentric ...1943 Aust. sl.
• ZAM-ZODY stupid, soft ...1889 Eng. dial.
• ZAM-ZOED stupid, soft ...Bk1904 Eng. dial.
• ZATENFARE stupid, senseless, idiotic ...1746 Eng. dial.
• ZAWKIN stupid, thick-headed ...Bk1904 Eng. dial.
stupid - nouns (also see STUPIDITY)
• BOOBOISIE boobs as a class, stupid people ...E20 US sl.
• CHUPIDNESS stupidity ...20C W. Indies sl.
• DASTARDLINESS † inertness or dullness of wit; stupidity ...1553 
• DASTARDNESS † inertness of understanding; stupidity; dullness ...1552 
• DULLERY dullness; stupidity; unenlivened condition ...1653
• DUNCERY behaviour or qualities characteristic of a person who is stupid or slow to learn or understand; stupidity, idiocy ...1615
• DUNCICALITY the state of being a dunce; stupidity, idiocy ...1790
• DUNCISHNESS the state of being a dunce; stupidity, idiocy ...1805
• DUNDERHEADISM foolishness, stupidity ...1836
• FOOD FOR THE SQUIRRELS a stupid job, task, or scheme ...Bk1974 Amer. sl.
• FOOL FILE a mythical library of the stupidest things ever said ...1991 US sl.
• JACKASSISM action or behaviour characteristic of a jackass or fool; foolishness, stupidity ...1817
• JACKASSNESS the quality of being a jackass or fool; foolishness, stupidity ...1803
• JINGLEBRAINS stupidity ...Bk1942 Amer. colloq.
• MOPERY stupidity or ineptitude ...20C US police & criminals' sl.
• POINTED HEAD a stupid, dunce-like mind; a brainless cranium ...1940s Amer. sl.
• QUADDLIN a semi-imbecile, stupid manner ...Bk1905 Eng. dial.
• QUIDDLING a semi-imbecile, stupid manner ...Bk1905 Eng. dial.
• SIX HAT AND A FIFTY SHIRT descriptive of a stupid, strong fellow ...Bk1942 Amer. sl.
• STRONG BACK AND A WEAK MIND descriptive of a stupid, strong fellow ...Bk1942 Amer. sl.
stupid - person 
• ABDERITE a stupid, narrow-minded person - the inhabitants of Abders, a maritime town in Thrace, were anciently proverbial for their stupidity - a scoffer ...Bk1827
• ADAM HENRY an AH, an asshole, a jerk; a contemptible person; a person who behaves despicably; a very stupid or annoying person ...Bk2006 US sl.
• ADDLE-BRAIN one whose head is addled; a stupid or half-witted fellow; a foolish bungler; a dullard ...1799
• ADDLE-HEAD one whose head is addled; a stupid bungler; an easy dupe; a dullard; a weak, silly person ...1592
• ADDLE-PATE a stupid bungler; a dullard; a weak, silly person; a foolish person; an easy dupe ...1601 
• AH-AH a stupid person ...1928 Amer. dial.
• A-HOLE an asshole; a very stupid or annoying person
• AIRBRAIN a stupid person ...Bk2006 US sl.
• AIRHEAD a stupid person ...US sl.
• AIVER a stupid person ...Bk1866 Sc. 
• ALF a stupid man ...Bk1988 Aust. sl.
• ALL-AMERICAN CHUMP a stupid person ...World War II Amer. sl.
• ANIMAL a fool; an oaf; a stupid person ...L16
• APPLEKNOCKER a stupid person; used as a general term of abuse ...1939 Amer. dial.
• ARSE a stupid, unpleasant, or contemptible person; a fool ...c1785
• ARSEHOLE a stupid, irritating, or despicable person; a person who behaves contemptibly ...1928
• ASS a foolish or stupid person ...c1450 colloq.
• ASSCLOWN a stupid or contemptible person ...1999
• ASSEN-HEAD a blockhead; a stupid person ...Bk1898 Eng. dial.
• ASSFACE an unpleasant, stupid person ...1990s US campus sl.
• ASSHAT a stupid or contemptible person ...1999
• ASSHEAD a stupid or foolish person; an idiot ...a1500 colloq.
• ASSHOLE a stupid, irritating, or contemptible person; a person who behaves despicably ...1962 US sl.
• ASSINEGER a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ASSINEGO a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ASSNEGER a fool, a simpleton, a stupid person ...Bk1898 Eng. dial.
• ATTWOOD a foolish fellow; a stupid person; a blockhead; a simpleton ...1894 Eng. dial.
• AUMERIL a stupid, unmethodical person ...Bk1898 Sc.
• AUMRIE a very stupid person ...B1900 Sc.
• AUNT HAGGIE'S CHILDREN any stupid, lazy, despised people ...1985 Bermuda sl.
• AVER a stupid person ...Bk1898 Sc.
• AWK a stupid, clumsy person ...1811 Eng. dial.
• AWPS a stupid, clumsy, gawky person ...1790 Eng. dial.
• BAALTY-BRAINS a stupid person ...Bk1898 Eng. dial.
• BABION † (derogatory) a term of contempt for a person; a stupid or foolish person ...a1529
• BABOON (derogatory) a foolish, stupid, or contemptible person; a person considered to resemble a baboon in appearance; an ugly or uncouth person; an oaf, a jerk; often as a term of abuse ...1592
• BACKDATED CHUCK a backward, ill-informed person, naive and stupid ...Bk1971 Boonville California jargon 
• BACON-BRAINS a fool, a stupid clodhopper, a clownish blockhead ...a1634
• BACON-HEAD a dunce, a stupid person ...Bk1986 Eng. dial. 
• BAFFIN a soft, stupid person ...Bk1911 Sc.
• BAGGER a clumsy person, a stupid person, a dolt, a jerk; an ugly person ...Bk1989 US college sl. 
• BAKEBRAIN (derogatory) someone with limited or damaged mental faculties; a fool, an idiot; a stupid person ...1949 US sl.
• BAKEHEAD a fool, an idiot; a stupid person; an insane or crazy person  ...1949 US sl.
• BALL a stupid or silly fellow; used in response to an unintelligent action, as a sarcastic response to a foolish remark or as an observation on someone's character or lack thereof ...a2002 US sl.
• BALLOON HEAD an arrogant, conceited, or stupid person; a fool, a simpleton, a silly, empty-headed person ...1931 colloq., chiefly US
• BALONEY an oafish, stupid, or clumsy person; an idiot; a worthless person ...1920 US sl.
• BALOOEY a worthless, stupid person ...20C sl., orig. US
• BAM a mindlessly violent, stupid person ...1993 UK sl.
• BANANA a stupid or worthless person; a simpleton; a silly or crazy individual ...1919 US sl.
• BANANAHEAD a simpleton, a fool, an idiot, a stupid person ...1949 US sl.
• BAP a stupid person ...1929 Sc.
• BARNEY a stupid man; an idiot ...Bk1993 surfing sl.
• BARRELHEAD an oaf, a stupid person ...1928 US sl.
• BATTLE-HEAD a stupid, thick-headed fellow ...Bk1886 Eng. dial.
• BATTY WAX a stupid, gullible person ...1996 W. Indies
• BAWHEAD a person with a large round face; also, a stupid person; frequently used as a term of mild abuse ...1985 Sc. colloq.
• BAYARD † a stupid, clownish fellow ...Bk1895
• B.B. a bird-brain; a fool, a stupid person; one of low intelligence; a slow-witted person ...1958 US sl.
• B.B. BRAIN a stupid person; a person with a brain the size of shot; also, a rude term of address ...Bk1995 Amer. sl.
• BB STACKER a stupid person; a fool ...1960 US sl.
• BEANBRAIN a fool; a simpleton; a stupid oaf ...1953 US sl.
• BEAN-HEAD a dull, stupid person; a fool; an oaf ...1917 Amer. sl.
• BEAST a stupid person, a dolt, a blockhead ...1594
• BEAU a stupid or clumsy person ...1989 US college sl.
• BEEF-HEAD a stupid, thick-headed person; a dolt ...1775
• BEETLE-BRAIN (derogatory) a person of low intelligence; a stupid person; a blockhead; a fool; a dolt ...1593
• BEETLE-HEAD (derogatory) a person of low intelligence; a blockhead; a fool, a stupid person ...1577 
• BEFF a stout, stupid person ...Bk1866 Sc.
• BEFFAN, BEFFIN a very stout, stupid person ...Bk1866 Sc.
• BELL END a term of abuse; a stupid or unpleasant person ...1992 sl.
• BELL ENDER a term of abuse; a stupid or unpleasant person  ...2001 sl.
• BENNY an unsophisticated peasant; a stupid person ...1998 UK sl.
• BERK a despicable person; a stupid or offensive person; a disliked person; a fool ...1929 Brit. rhyming sl. for 'cunt' (Berkeley Hunt)
• BESOM-HEAD a foolish or stupid person; a blockhead ...1864
• BEVAN a stupid or unfashionable male; a geek or dork; an uncouth person, an unrefined, ill-educated male ...1988 Aust. sl.
• BEVAN CHICK a stupid or unfashionable female; a geek or dork ;an uncouth woman, an unrefined, ill-educated female ...2017 Aust. sl.
• BEV CHICK the girlfriend of a 'bevan'; a stupid or unfashionable female; a geek or dork ;an uncouth woman, an unrefined, ill-educated female ...2003 Aust. sl. 
• BEZOM-HEAD a foolish, stupid person ...1889 Eng. dial.
• BICKER a person of rude, noisy manners; a big, stupid, bouncing person ...1866 Sc.
• BIFFA an unattractive, stupid and/or promiscuous woman  ...1934 US college sl.
• BIG BOOB a stupid fellow ...Bk1913-17 Amer. dial.
• BIG CHUMP a stupid person ...World War II Amer. sl.
• BIG CLUCK a stupid person ...World War II Amer. sl.
• BIG CLUNK a stupid person ...World War II Amer. sl.
• BIG LUG a stupid man, esp. a big one ...1930s US sl.
• BIG POTATO a large but stupid man ...1937 US sl.
• BIG STIFF a term of abuse; a fool; a rough, clumsy, stupid, or overbearing man; a mean, disagreeable or contemptible person; a disliked person; an uncouth, self-opinionated person ...1896 sl., orig. US
• BILLY-MINAWKY a foolish or stupid fellow ...Bk1887 Eng. dial.
• BILLY-WITH-THE-PINAFORE-ON a stupid fellow ...Bk1898 Eng. dial.
• BIM a thug; a large, stupid man; one who is inconsequential or contemptible; a bozo ...1924 US sl.
• BIMBETTE an adolescent or teenager considered sexually attractive but of limited intelligence ...1982 sl., orig. US
• BIMBO a young woman considered sexually attractive but of limited intelligence ...1927 sl., orig. US
• BINLID a stupid person; a fool ...Bk1997 Ulster sl.
• BIRD one who deserves ridicule; a stupid person ...1908 US sl.
• BIRD-BRAIN a person with a small brain; one of low intelligence; a frivolous, scatterbrained person; a fool; a stupid person ...1933
• BIRDSEED a silly or stupid person; an unpopular person ...1946 US teen sl.
• BIRK a fool; a stupid or slow-thinking person ...1929 sl.
• BISH a fool, a stupid person, a dope ...1963 US teen sl.
• BIVOLOPUS a very stupid person ...1912 Amer. dial.
• BIZZUM-HEAD a person who is equally foolish and stupid ...Bk1855 Eng. dial.
• BLAITIE-BUM a stupid, simple fellow ...1540 Sc.
• BLIND BUZZARD a worthless, stupid, or ignorant person ...1377
• BLISTER (derogatory) a stupid person ...1941 Amer. dial.
• BLOCK a fool, an idiot, a stupid person ...M16 sl.
• BLOCKHEADESS a female blockhead; a stupid woman ...1827 nonce word
• BLUMF a dull, stupid fellow ...Bk1911 Sc.
• BLUNKART a stupid person ...Bk1911 Sc.
• BLUNT a stupid fellow ...Bk1911 Sc.
• BLUNTIE † a stupid person; one not sharp of wits; a sniveller ...1768 obs. exc. Sc.
• BOG-STALKER an idle, lounging, stupid fellow ...Bk1911 Sc.
• BOHUNKUS a stupid, obnoxious, or worthless person; often used as a term of abuse or a contemptuous form of address ...1933
• BONEHEAD a stupid or stubborn person ...20C sl.
• BONE-TOP a dull or stupid fellow; one who makes blunders ...1919 Amer. dial.
• BOOB a stupid person, a dolt, a blockhead; a silly or childish person ...1909 sl.
• BOOBY a silly, stupid, or childish person ...E17
• BOODLE a stupid person, a dolt, a blockhead ...1862 sl.
• BOUFF a stupid, blundering fellow ...Bk1911 Sc.
• BOZO a dull-witted, stupid person; a lout ...1966 Amer. dial.
• BRAINLESS BRAWN descriptive of a stupid, strong fellow ...Bk1942 Amer. sl.
• BROAD WITH A SOFT CONK a stupid or silly woman ...World War II Amer. sl.
• BUFFLEHEAD a fool, a blockhead, a simpleton, a stupid person, a silly person, an ignoramus ...1659
• BUG a stupid or silly person ...1900 Amer. college sl.
• BUTT a stupid or contemptible person ...1993 Amer. sl.
• BUTTHEAD (derogatory) a stupid or obnoxious person of either sex ...Bk2006 US sl.
• BUTT PLUG a stupid or contemptible person ...1993 Amer. sl.
• BUZZARD a worthless, stupid, or ignorant person ...1377
• CABBAGE (derogatory) a stupid, dull, inactive person; a silly person ...1870 sl.
• CABBAGE-HEAD a brainless fellow; a thickhead ...1682
• CAKE a foolish or stupid fellow ...1785 Eng. dial. & sl.
• CALF a fool, a simpleton; a stupid or loutish person; an awkward or silly boy or man; a meek, harmless person ...1553 sl.
• CALF-LOLLY † a stupid fellow; a dolt ...1708
• CALF'S HEAD a stupid, witless individual ...1600 sl.
• CAPON an idiot, a dull, stupid person; a term of reproach ...1542
• CARLE-GROPUS † a stupid person; a fool ...1866 Sc.
• CEMENTHEAD a blockhead, a fool, a stupid person ...1949 Amer. sl.
• CHEESEDICK a disgusting or contemptible fellow; a stupid person ...1986 US sl.
• CHEESEDIX a disgusting or contemptible fellow; a stupid person ...1986 US sl.
• CHEESE DONG a disgusting or contemptible fellow; a stupid person ...1986 US sl.
• CHEESE-HEAD a stupid, awkward person ...1919 Amer. dial.
• CHICKEN-HEAD a dull, stupid person ...1919 Amer. dial.
• CHICKEN'S HEAD a stupid, immature girl ...1960s US Black sl.
• CHIEF a stupid person ...1990s US sl.
• CHOLTER-HEAD a stupid person, a blockhead, a dolt ...1897 Eng. dial. 
• CHOWDERBRAIN a fool, a stupid person ...1960 US sl.
• CHOWDERHEAD a stupid person, a fool, a blockhead; a muddle-headed person; a dunce ... 1682 sl.
• CHOWTER-HEAD a stupid person, a blockhead, a dolt ...1897 Eng. dial. 
• CHUCKLEHEAD a fool; a silly person; a stupid person ...1731
• CHUCKLE-PATE a stupid fellow; a blockhead ...1820
• CHUMPHEAD a stupid person ...Bk2006 US sl.
• CLOD a stupid person ...L16
• CLODPATE a stupid fellow, a blockhead, a dolt, an oaf ...1636
• CLOUTER-HEAD a foolish, stupid person; one deficient in understanding ...c1861 Eng. dial.
• CLUCK a stupid oaf; a fool ...20C US colloq.
• CLUCKHEAD a stupid oaf ...20C US colloq.
• CLUMPERTON † a clown, a clodhopper; a countryman; a silly or stupid fellow ...c1534
• COD'S-HEAD a stupid fellow, a fool, a blockhead; a dupe ...1566
• COOF a silly or stupid person ...1715 chiefly Sc.
• CORNBALL a stupid or corny person ...Bk2006 US sl.
• CRACKED EGG a silly or stupid person ...World War II Amer. sl.
• CUDDIE, CUDDY a stupid person ...Sc. & Eng. dial.
• DAFFE † a stupid, foolish person ...c1325
• DAFFHEAD a blockhead, a stupid person ...Bk1873 Eng. dial.
• DAFTIE a stupid, silly or foolish person ...1872 colloq.
• DAG a stupid or unpleasant person ...Aust. sl.
• DAKES-HEAD a spiritless, stupid person ...Bk1900 Eng. dial.
• DASIBERD † a stupid fellow, a fool, a dullard, a simpleton ... c1400
• DATE a foolish, silly, stupid, or weak person ...1914 UK sl.
• DAWCAKE a stupid, silly, awkward person ...1892 Eng. dial.
• DAWCOCK † a stupid, silly, awkward fellow, a simpleton, a fool ...1556 obs. exc. Eng. dial.
• DAWKAWK a stupid, silly, awkward person ...Bk1900 Eng. dial.
• DAWKIN a dull, stupid person, a simpleton, a fool ...1565 Eng. dial.
• DEACON (derogatory) an excessively stupid or unpleasant person ...20C teen sl.
• DEADASS a lazy or stupid person; a boring or feeble person; an absolute dullard ...1959 Amer. sl.
• DEAD-HEAD a stupid person ...1930s US Black sl.
• DEAD MEAT a dull, stupid person ...1980s sl.
• DEADNECK a very stupid person ...1910s sl.
• DEAF-HEAD a stupid, dull fellow ...Bk1900 Eng. dial.
• DICK (derogatory) a stupid person, usually male ...Bk2006 US sl.
• DICK SMACK a moron; a stupid jerk ...Bk2006 US sl.
• DICKWARD a stupid and ineffective male ...Bk2006 US sl.
• DICKWEED a stupid and ineffective male ...Bk2006 US sl.
• DILDO (derogatory) a stupid person, usually a male ...Bk2006 US sl.
• DIMBO a stupid person ...1977 Can. sl.
• DIM BULB a dull person; a stupid person ...Bk2006 US sl.
• DIMMO a stupid person ...1977 Can. sl.
• DING-A-LING a fool; an oaf; an odd, giddy person who hears bells; a dull, stupid person; a silly or light-headed person ...1935 US sl.
• DINGBAT a dull, stupid person; a fool; a silly or light-headed person ...1915  Amer. dial.
• DINGDONG a dull, stupid person; a fool; an oaf; a silly or light-headed person ...1968 Amer. dial.
• DINGHEAD a stupid person ...Bk2006 US sl.
• DINGLEBERRY an oaf; a person stupid enough to ingest dingleberries while performing anilingus ...20C US sl.
• DIP a stupid, sloppy oaf; a foolish person ...1932 sl.
• DIPSHIT a person of no consequence and no intelligence; a stupid jerk, an oaf ...1962 US sl.
• DIPSTICK an inept fool; an idiot; a jerk; a stupid or contemptible person; an oaf ...1963 US sl.
• DIPWAD a stupid or offensive person; a dope, one who lacks intelligence ...1976 US college sl.
• DIRTY JOKE a very ugly or very stupid person ...Bk2006 US sl.
• DIZZARD † a foolish, stupid, or silly fellow; an idiot, a blockhead; a weak-minded person ...1547 obs. or arch.
• DOBBIE a stupid fellow; a blockhead, a fool, a simpleton, a dolt; a childish old man, a dotard; an awkward fellow, a clown ...1677 Sc. & Eng. dial.
• DOCUS a stupid fellow ...1819 Sc.
• DODDY-PATE † a stupid person, a blockhead, a fool, a dunce ...c1500 obs. exc. Eng. dial.
• DODUNK a stupid, simple person; a blockhead ...1894 Amer. dial.
• DOOBIE a dull, stupid fellow; a fool, a simpleton; a dunce ...19C Sc.
• DOODLE-BRAIN a general insult; a stupid person, a fool ...1990s Aust. teen sl.
• DOODLE-HEAD a general insult; a stupid person, a fool ...1990s Aust. teen sl.
• DORF a stupid or weird person ...Bk2006 US sl.
• DORK a stupid or ridiculous person; a jerk, a nerd ...1960 sl.
• DOTTEREL a silly, stupid person, esp. one who is easily duped ...Eng. dial.
• DOWF a spiritless, stupid, or gloomy person ...LME Sc. & N. Eng. dial.
• DOWFART a dull or stupid person ...E18 Sc. arch.
• DROMEDARY a stupid bungling person ...M16 now Eng. dial.
• DRONGO an idiot, a simpleton, a stupid person ...1945 Aust. sl.
• DROOB a stupid fool ...Bk1999 Aust. sl.
• DROOLY a stupid, unpopular person ...1940s US sl.
• DRUGGLE † a term of contempt or reproach: apparently a heavy, stupid, spiritless or cowardly fellow ...1611
• DRUMBLEDORE a heavy, sluggish, stupid fellow ...1881
• DUFFER a worthless person; a stupid man; an awkward, unskilful fellow; a coward ...Bk1890 sl.
• DUH-BRAIN a stupid person ...2006 UK sl.
• DULLY a dull or stupid person ...1883 colloq.
• DULMAN † a dull or stupid person; used humorously as a proper name ...1615
• DUMB a foolish or stupid person ...1928 US sl.
• DUMB ASS a stupid person ...1958 US sl.
• DUMBBELL an oaf; a stupid or unthinking person ...1918 US colloq.
• DUMB BUNNY a stupid person; an oaf ...1922 colloq.
• DUMB CLUCK a dull or stupid person; a fool ...1929 sl., orig. US
• DUMB-DODO a very stupid person ...Bk2006 US sl.
• DUMB DORA a stupid woman ...1922 sl., orig. US
• DUMB-DUMB, DUM-DUM a foolish or stupid person ...1970 US sl.
• DUMBELL an oaf; a stupid or unthinking person ...E20 US colloq.
• DUMBFUCK a despicable, stupid person ...1950 US sl.
• DUMBLEDORE a stupid fellow, a dolt, a blockhead ...1777 Eng. dial.
• DUMBO a dolt, a fool; a large and stupid oaf ...1932 US sl.
• DUMB OX a stupid, awkward, or uncommunicative man ...1756 colloq.
• DUMBSHIT a stupid oaf; an imbecile ...1961 US sl.
• DUMBSKI a stupid person ...Bk2006 US sl.
• DUMMEL a dumb person; a stupid, dull person ...1570
• DUMMOCK a stupid or mischievous child ...19C Eng. dial.
• DUMMY a stupid oaf ...L16
• DUNCECOMB † a stupid person; a fool; a dim-witted person; a dunce ...1612
• DUNCEHEAD (derogatory) a stupid, inept, or dim-witted person; an idiot ...1749
• DUNDERCLUNK a big, stupid person ...19C Sc.
• DUNDERHEAD (depreciative) a stupid, slow-witted person; an idiot; a fool ...1630
• DUNDERPATE (depreciative) a stupid or foolish person ...1697 arch.
• DUNDERWHELP (depreciative) a stupid or foolish person ...a1625 arch.
• DUNNY † a stupid, dim-witted person; an idiot ...1709
• EEL-DROWNER anyone who is not clever or acute ...Bk1900 Sc.
• ELEPHANT AND CASTLE an oaf, a stupid person ...19C Brit. rhyming sl. for 'ass-hole'
• ELMER an unsophisticated, esp. rustic, man or boy; an inexperienced, stupid boy ...1926 US sl.
• EMPTY BEAN a stupid person ...Bk1942 Amer. sl.
• EVEN a character, always used in a bad sense; a dull, slow, stupid person ...1885 Eng. dial.
• FARMER a stupid or unsophisticated person; an unmannerly or otherwise objectionable person ...M19 sl.
• FART a stupid, despicable, and annoying person ...Bk2006 US sl.
• FART-BLOSSOM a worthless or despicable person; a person inclined to stupid behaviour ...1938 Amer. sl.
• FARTHEAD a stupid or despicable person ...1962 Amer. sl.
• FART HOOK a stupid or worthless, useless person ...1973 US sl.
• FAT-HEAD one having a fat head; a stupid dolt; a senseless fellow; an oaf; one whose brain is composed of fat and is therefore useless ...1842
• FEATHER-BRAIN a foolish, giddy person; a dull, stupid person; a silly, light-headed person ...1839
• FEATHER MERCHANT a silly or stupid person ...1968 Amer. dial.
• FEEB a stupid or mentally disabled person ...E20 US sl.
• FISH a stupid, inept person ...Bk2006 US sl.
• FLATHEAD a stupid person ...Bk2006 US sl.
• FLUMMOX a stupid person ...19C US sl.
• FLUMMUX a stupid person ...19C US sl.
• FOOD FOR THE SQUIRRELS a stupid or foolish person ...Bk1974 Amer. sl.
• FOPDOODLE † a silly, vain, empty person; a stupid or insignificant fellow; a fop, fool, simpleton ...E17
• FRIP a dull, foolish, or stupid person ...1970 US college sl.
• FUCKBAG a stupid, contemptible, or despicable person ...1972 US sl.
• FUCKBRAIN a stupid, contemptible or despicable person ...1970 US sl.
• FUCKHEAD a stupid, despicable, or contemptible person ...1962 US sl.
• FUSSOCK a contemptuous term for a stupid person ...1740 Eng. dial.
FUZZ-BRAIN a stupid person ...1960s sl.
• GAA-BOBBY a stupid person; a booby ...Bk1900 Eng. dial.
• GAAP-A-LEERIE a stupid-looking person ...1932 Sc.
• GAAPUS a stupid fellow addicted to much speaking ...Bk1893 Sc. & Eng. dial.
• GABBY a stupid or foolish person; an idiot; a simpleton ...1926 US sl.
• GABEY, GABY a stupid or foolish person; an idiot; a fool ...1746 colloq. & Eng. dial.
• GAIBIE a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Sc.
• GAKEM a stupid fellow; a fool ...Bk1895 Eng. dial.
• GALAH a fool, a stupid person; a simpleton; an ineffectual person ...1938 Aust. sl. 
• GALIMAVIS a fool, a stupid person ...1925 Sc.
• GALLOOT, GALOOT a man, esp. if hulking, stupid, boorish, foolish, clumsy, or otherwise objectionable; an awkward or uncouth person ...1818 UK
• GALUMPUS a stupid person ...Bk1900 Eng. dial.
• GAMERAL a fool; a stupid fellow; a dunce; a silly lout ...1826 Eng. dial.
• GAMFRAL a stupid or foolish person ...Bk1997 Ulster sl.
• GAMFRAL, GAMFREL, GAMFRIL * a stupid or foolish person; a blockhead, an idiot; a forward, presumptuous person ...1729 Sc.
• GAMFUL a stupid or foolish person ...Bk1997 Ulster sl.
• GAMMEREL a fool; a stupid fellow; a dunce; a silly lout ...1826 Eng. dial.
• GAMPHREL a fool; a stupid or senseless fellow; a blockhead ...1728 Sc.
• GANDER a dull or stupid person; a fool, a simpleton; a gawky person ...1553
• GANNER a stupid person, a 'goose' ...1863 Sc.
• GANNERHEAD a stupid person, a dunce ...Bk1839 Eng. dial.
• GANSH a person with a widely-gaping mouth; hence, a stupid, dull-witted, or clumsy person; a silly, stammering fellow who tries to explain himself an fails ...1880 Sc.
• GAPESNATCH a fool, a stupid person ...Bk1868 Eng. dial.
• GAPIE a stupid, gaping, or irresponsible person; a fool ...1908 Sc.
• GAP-MOUTH a stupid, loutish person ...Bk1886 Eng. dial.
• GAPPY a stupid, gaping, or irresponsible person; a fool ...1908 Sc.
• GARRICK a stupid, awkward person ...1811 Eng. dial.
• GASSER a remarkable person, specifically, a remarkably stupid, amusing, or eccentric person; a remarkably talented, intelligent, cool person ...1944 Amer. sl.
• GAUCUM, GAUKUM a fool, a simpleton, a booby; a stupid, clumsy fellow ...1846 Eng. dial.
• GAUKY an awkward, stupid, badly-mannered person; an oaf; an awkward fool; a simpleton who stares vacantly ..Bk1828 Eng. dial.
• GAUM a painfully stupid or gullible person; a fool ...1837 sl., orig. Irish
• GAUMERIL a fool; a stupid fellow; a dunce; a silly lout ...1826 Sc. & Eng. dial.
• GAUMLESS a stupid, half-witted person; a fool ...1896 Eng. dial.
• GAUMLESS-HEAD a stupid, half-witted person; a fool ...1896 Eng. dial.
• GAUMRIL a fool; a stupid fellow; a dunce; a silly lout ...1826 Eng. dial.
• GAUMUCK a stupid person; a fool ...1890 Eng. dial.
• GAUP a fool or simpleton, a stupid person; one who gapes rudely ...1825 Sc. & Eng. dial. & colloq.
• GAUPHEAD a stupid, staring, fellow ...1895 Eng. dial.
• GAUPIE a stupid or silly person, a simpleton ...1825 Sc.
• GAUPUS a stupid, silly person, a simpleton; a fool; a clumsy lout; an open-mouthed, vacant-minded person, esp. one given to talking much and foolishly ...1808 Sc. & Eng. dial.
• GAUPY a vacant, staring person; a fool, a blockhead, a simpleton; a stupid or silly person ...1856 Sc. & Eng. dial.
• GAWBY a stupid or foolish person; an idiot; a blockhead; a simpleton; a lout ...1746 colloq. & Eng. dial.
• GAWFIN a stupid, clownish fellow ...1790 Eng. dial.
• GAWK an awkward, clumsy, stupid person; a fool; a simpleton; a lout, a bumpkin, an uncultivated person; a dupe ...1685
• GAWKUM a fool, a simpleton, a booby; a stupid, awkward, clumsy fellow; a lout ...1846 Eng. dial.
• GAWKUMY a fool, a simpleton, a booby; a stupid, clumsy fellow; a lout ...1846 Eng. dial.
• GAWKY a left-handed person; a tall, ungainly, clumsy person; a stupid, awkward fellow; a fool; a simpleton; a lout, a bumpkin, a clownish fellow ...1726
• GAWM a painfully stupid or gullible person; a fool; a simpleton; a lout ...1837 sl., orig. Irish
• GAWMEREL a fool; a stupid fellow; a dunce; a silly lout ...1826 Eng. dial.
• GAWMOGE a painfully stupid or gullible person; a fool ...Bk1910 Ireland English
• GAWNEY, GAWNY a fool; a simpleton; a stupid, awkward person ...1777 Eng. dial. 
• GAWNICUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1867 Amer. dial.
• GAWP a fool or simpleton, a stupid person; one who gapes rudely ...1825 Sc. & Eng. dial.
• GAWPIE a stupid or silly person, a simpleton ...1825 Sc.
• GAWPUS a stupid, silly person, a simpleton; a fool; a blockhead; a clumsy lout; an open-mouthed, vacant-minded, staring person, esp. one given to talking much and foolishly ...1808 Sc. & Eng. dial.
• GAZAB an awkward, strange, or stupid person ...1889 sl.
• GAZABE an awkward, strange, or stupid person; a peculiar or loutish person ...1899 sl.
• GAZABO an awkward, strange, or stupid person; an odd, peculiar or loutish person ...1889 sl.
• GAZABOO an awkward, strange, or stupid person ...1894 sl.
• GAZAYBO an awkward, strange, or stupid person ...1889 sl.
• GAZEE a stupid, loutish, or peculiar person ...1927 US sl.
• GAZEEBO an awkward, strange, or stupid person ...1889 sl.
• GAZIMBAT an awkward, strange, or stupid person; any fellow ...1914 sl.
• GAZOO a fool; a stupid or unpleasant person; a lout, a boor ...1914 UK sl.
• GAZOOK a fool; a stupid or unpleasant person; a loud lout, a boor; a clumsy oaf; an ineffectual or incompetent person ...1901 US sl.
• GAZOOKUS a fool; a stupid or unpleasant person; a lout, a boor ...1924 US sl.
• GAZOOMA a thug; a stupid man ...1950 US criminals' sl.
• GAZOOP a fool; a stupid or unpleasant person; a lout, a boor ...1901 US sl.
• GAZOOPUS a fool; a stupid or unpleasant person; a lout, a boor ...1933 US sl.
• GAZUNY an awkward, strange, or stupid person; any fellow ...1889 sl.
• GECK † a fool, a simpleton, a dunce; a stupid, clumsy fellow; one who is befooled or derided, one easily imposed on, a dupe ...c1530 obs. exc. Eng. dial.
• GEEGAW a harum-scarum or stupid person ...1952 Sc. & Eng. dial.
• GEITTER a stupid, talkative person ...Bk1866 Sc.
• GEITTERAL a very stupid person ...Bk1866 Sc.
• GERBIL a stupid, insignificant, or unpleasant person; a foolish or obnoxious person ...1986 US sl.
• GHOMEY a painfully stupid or gullible person; a fool ...1837 sl., orig. Irish
• GIBLET a stupid, foolish, or inept person ...1984 US sl.
• GIBONEY a stupid, foolish, or offensive person; also, a hired thug, a hoodlum; broadly, a man, a fellow ...1921 Italian-American sl.
• GIDDY-BRAIN a giddy, frivolous person; a light-headed, stupid person ...a1652
• GIG a fool, a simpleton, an idiot, a stupid person; a trifling, silly, flighty fellow ...1685 Eng. dial.
• GIGGLEGAWKIE a stupid, awkward person ...1891 Sc.
• GILLIE a rather stupid, foolish or silly person; a simpleton ...1770
• GILLIEPEROUS a stupid fool ...1935 Sc.
• GILLIPIN a stupid person; a sucker ...1936 US sl.
• GILPIN a thick-witted, stubborn fellow; a stupid person ...1929 Sc. & US sl.
• GILPY † a young man or boy, esp. a lively or impudent one; a roguish boy; also, a soft, stupid person  ...1718 Sc.
• GIMP (derogatory) a stupid, foolish, unpleasant, obnoxious, or contemptible person; a simpleton; an incompetent or weak person ...1924 sl., orig. US
• GIMPY (derogatory) a stupid, foolish, unpleasant, obnoxious, or contemptible person ...1959 US sl.
• GINK (often derogatory) a fellow; a guy; esp. an odd, eccentric, or foolish man; a stupid or useless person; someone who is unworldly or socially inept ...1906 sl., orig. US
• GINKERINO a stupid, useless person ...1921 US sl.
• GLEEP an odd, obnoxious, or foolish person; a stupid person; an oaf; a disliked person ...1947 US college sl.
• GLIPE a young, thoughtless girl; a soft, stupid person ...1821 Sc.
• GLOM a fool, a stupid person; an awkward person; a worthless or inept person; a dunce ...1930 US sl.
• GLUNDIE, GLUNDY † an inactive, awkward, or clownish person; a fool; a stupid person ...1824 Sc.
• GLUNNY † an inactive person; a fool; a stupid person ...1825 Sc.
• GLUNTER a stupid person ...Bk1910 Ireland
• GLUNTOCH † a stupid fellow; a surly, sullen person ...1825 Sc.
• GLYPE a stupid person ...1983 Irish sl. 
• GNAW-POST a stupid, ignorant person; a silly fellow; a fool, a simpleton ...1856 Eng. dial.
• GOBSHITE a stupid, incompetent, or contemptible person, esp. an ignorant loudmouth ...M20 sl., chiefly Irish
• GOB-THRUST a stupid fellow ...B1900 Eng. dial.
• GOCKIE a stupid person ...B1900 Sc.
• GOLOSHIN a stupid fellow, a ninny ...1825 Sc. 
• GONEY a stupid, awkward person; a foolish fellow; a simpleton ...1838 Amer. dial.
• GONK a dull, stupid person ...1966 Amer. dial.
• GONNER-HEAD a fool; a stupid fellow, a dunce ...1740 Eng. dial.
• GONNER-PATE a fool; a stupid fellow; a dunce ...Bk1900 Eng. dial. 
• GONUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1842 Amer. dial.
• GONY a stupid, awkward person; a foolish fellow; a simpleton ...1859 Amer. dial.
• GOOBERHEAD a dull and stupid person ...1970 Amer. dial.
• GOOBY a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Eng. dial.
• GOOK a dull, stupid, foolish person ...1910s sl., orig. US
• GOOMBAH a stupid person ...1950s US sl.
• GOON a stupid, awkward person; a foolish fellow; a simpleton ...1969 Amer. dial.
• GOONEY a foolish or stupid fellow; a simpleton ...1815 Eng. & Amer. dial.
• GOONUS a fool, a dolt, a stupid fellow, an ignoramus, a simpleton ...1959 Amer. dial.
• GOONY a stupid, awkward person; a foolish fellow; a simpleton ...1948 Amer. dial.
• GOOPUS a stupid oaf ...M20 US sl.
• GOOSE a stupid, thoughtless person ...Bk1913-17 Amer. dial.
• GOOSECAP † a silly fellow; a stupid, foolish person; a simpleton; an idiot; a giddy or flighty young girl ...1589 obs. exc. Eng. dial.
​• GOOSTRUMNOODLE a stupid person; a fool ...1871 Eng. dial.
• GORBY a stupid, foolish person; a blockhead, a simpleton, a fool, a lout ...1790 Eng. dial.
• GOUK a dull, stupid, foolish person ...1910s sl., orig. US
• GREENY a naive or inexperienced person; a greenhorn; a simpleton; a dull and stupid person ...1848 Amer. dial. 
• GRIZZLEDEMUNDY a term of abuse applied to a person who laughs at any trifling thing; a grinning fool; a stupid oaf ...1818 Eng. dial.
• GROPUS a stupid person ...B1900 Sc.
• GROUT-HEAD † a blockhead, a thickhead, a dunce, a stupid person ...1550 obs. exc. Eng. dial.
• GRUNT a stupid or unpleasant person ...1968 US sl.
• GUMBAH a stupid person ...1950s US sl.
• GUMP a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt ...1825 Amer. dial.
• GUMP-HEAD a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt ...1916 Amer. dial.
• GUMPY a stupid, foolish, or awkward person; an idiot; a senseless person; a dolt ...1892 Amer. dial.
• GUNK a dull, stupid person ...1966 Amer. dial.
• GUNSEL a stupid or inexperienced youth ...US sl.
• GUT-HEAD † one who is stupid from over-feeding ...1629
• HABBER one who stammers, stutters or speaks thickly; hence, a stupid person ...1866 Sc.
• HABBERJOCK a big stupid person who speaks thickly and hurriedly ...Bk1866 Sc. 
• HAIVER a stupid, chattering person; an incoherent or garrulous person; a lazy, idle fellow ...1897 Sc. & Eng. dial.
• HAIVREL a stupid, half-witted person; a talkative, garrulous person; a fool ...1801 Sc.
• HALF-ASS a stupid, incompetent person ...1920s US sl.
• HALF-THICK a foolish or stupid person ...1896 Sc. & Eng. dial.
• HAMBURGER a stupid and worthless person ...Bk2007 US sl.
• HAMMER-HEAD † a head likened to a hammer; a blockhead; an oaf; a dull, stupid fellow ...1532
• HARDHEAD an obstinate or stupid person ...1519
• HASH a stupid person; a person who 'makes a hash' of his words, etc., one who is careless or muddled in speech or action ...1655 Sc.
• HAUVING-GAM a stupid person ...Bk1902 Eng. dial.
• HAVEREL a stupid, half-witted person; a talkative, garrulous person; a fool; one who talks without sense ...c1779 Sc. & Eng. dial.
• HAVERIL a stupid, half-witted person; a talkative, garrulous person; a fool ...1801 Sc.
• HAVERS a stupid, chattering person; an incoherent or garrulous person; a lazy, idle fellow ...1897 Sc. & Eng. dial.
• HAVREL a foolishly chattering or garrulous person; a fool, a stupid, half-witted person, a simpleton ...c1779 Sc.
• HAWBAW a stupid, clumsy fellow; a lout; a coarse, vulgar lad ...1872 Eng. dial.
• HAWBUCK an unmannerly lout; a country bumpkin or clown; a coarse, vulgar lad; a foolish or stupid fellow; a simpleton ...1805
• HAWBY a stupid, clumsy fellow; a lout, a coarse, vulgar lad ...1872 Eng. dial.
• HAWKIE a stupid, clumsy fellow ...1787 Sc.
• HAYSEED a dull, stupid person ...1965 Amer. dial.
• HAZE-BAZE a fool, a stupid person, a ninny ...1877 Ireland
• HAZIE a stupid, thick-headed person ...Bk1902 Sc.
• HEAVYHEAD * a dull, stupid fellow ...1399
• HEEPY † a fool, a stupid person ...1800 Sc.
• HEY NONNY-NONNY an oaf; a blockhead; a stupid person ...19C Brit. sl.
• HOBBIL, HOBBLE a fool, a dull, stupid person; a blockhead, a dunce, an idiot ...1740 Sc. & Eng. dial.
• HOCKEY PUCK a stupid person ...1960s US sl.
• HORSECOCK a stupid or contemptible person ...1927 US sl.
• HORSE'S ARSE a stupid or contemptible person, usually a man ...1888 US sl.
• HORSE'S ASS a stupid or contemptible person, usually a man ...a1865 US sl.
• HORSE'S COCK a stupid or contemptible person ...1974 US sl.
• HORSE'S-NECK a stupid or contemptible person ...1928 US sl.
• HUMDUDGEON a big, stupid person of an evil disposition ...B1900 Sc.
• ICKY a stupid person, a person who is conventional ...1930s US Black sl.
• ICKY VICKI a stupid girl ...Bk1945 jive usage
• IDIOT a term of reprobation for one who speaks or acts in what the speaker considers an irrational way, or with extreme stupidity or folly; a stupid person; an utter fool; a crazy person ...c1375
• IDIOT-HEAD a stupid person ...1988 Aust. sl. 
• IGNANT an ignorant, stupid person ...1940s US Black sl.
• IGNORAMUS a stupid and unlettered person; first applied to ignorant lawyers ...1569
• IRONHEAD a stupid oaf, a fool ...20C sl.
• IVORY DOME a stupid person; a fool ...1911 US sl.
• JABONEY a greenhorn; a newly-arrived foreigner; an inept, stupid or inexperienced person; a guy or fellow ...1931 Amer. dial.
• JABRONEY an inept, stupid or inexperienced person; a guy or fellow ...1960 Amer. dial.
• JABRONIE an inept, stupid or inexperienced person; a guy or fellow ...1982 Amer. dial.
• JACK A LENT a simple, stupid fellow ...1598 arch.
• JACK-A-NODS a simple, stupid fellow; a fool; a simpleton...Bk1852 Eng. dial. 
• JACKASS a foolish or stupid person; an idiot, a dolt ...1756
• JACK LANTERN a fool; a dull, stupid fellow ...1896 Amer. dial.
• JACK O' LENT a simple, stupid fellow; a simpleton ...1598 
• JACKSON a silly, stupid fellow ...Bk1852 Eng. dial.
• JAG-OFF a dull, stupid person; an inept person ...1968 Amer. dial.
• JARBONI an inept, stupid or inexperienced person; a guy or fellow ...1959 Amer. dial.
• JARHEAD (derogatory) a dull, stupid person; a fool, an oaf ...1969 Amer. dial.
• JAY a stupid or silly person; a simpleton ...1884
• JAYBIRD a person or fellow; a rustic or countrified person; one considered ignorant, awkward, or unsophisticated; a dull, stupid person ...1886 Amer. dial.
• JAYHAWK a person or fellow; a rustic or countrified person; one considered ignorant, awkward, or unsophisticated; a dull, stupid person ...1907 Amer. dial.
• JAYHAWKER a person or fellow; a rustic or countrified person; one considered ignorant, awkward, or unsophisticated; a dull, stupid person ...1911  Amer. dial.
• JEFF a dull, stupid person; a pest ...1930s sl.
• JERK a useless or stupid person ...sl.
• JIBONEY an inept, stupid or inexperienced person; a guy or fellow ...1952 Amer. dial.
• JOBARD † a stupid fellow; a fool ...a1400
• JOBBERNOWL a stupid, thick-headed person; a blockhead, a fool, a dunce, a dolt ...1592 colloq.
• JOLTERHEAD a fool; a stupid person ...L18 sl.
• JOLTHEAD a fool; a stupid person ...L18 sl.
• JUMBLONEY an inept, stupid or inexperienced person; a guy or fellow ...1984 Amer. dial.
• KAIBREL † a lean, stupid fellow ...1838 Sc.
• KLUCK a stupid oaf; a fool ...20C US colloq.
• KLUTZ an oaf; a clod or a bungler; an idiot; an awkward, stupid person ...M20 US sl.
• KNOCK-SOFTLY a silly or stupid person; a fool ...1887 Eng. dial.
• KNUCKLE-HEAD a slow-witted or stupid person ...1944
• LABRICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a stranger; a naive or foolish person; often used as a mild term of abuse ...1889 Amer. sl.
• LACK-BRAIN one who is destitute of sense or brains; one wanting in wit; a stupid, empty-headed fellow, a fool ...1596
• LACK-WIT a witless or stupid person; a blockhead ...1668
• LAMEBRAIN a dolt; a blockhead; a stupid person ...1919 US sl.
• LAMEHEAD a dolt; a blockhead; a stupid person ...1978 US sl.
• LARDHEAD a stupid person; an idiot ...1936 Amer. sl.
• LAVERICK a fool; a dolt; an idiot; a dull, stupid person; a greenhorn; a naive person; a stranger; often used as a mild term of abuse ...1895 Amer. dial.
• LEATHER-EARS a stupid person; a fool; one slow of comprehension ...1903 Amer. dial.
• LEATHER-HEAD a fool, a blockhead, a dolt, an oaf, a stupid person; a person slow of comprehension ...a1700
• LEATHER-NECK a stupid person; a fool; a blockhead; an uncouth person ...1919 Amer. dial.
• LOBBUS an oaf, a stupid person ...20C sl.
• LOBCOCK † a country bumpkin; a clown, a lout, a boor; a dull, stupid, sluggish person; a clumsy, lubberly fellow; a blundering fool; a blockhead; a term of abuse ...a1553 obs. exc. Eng. dial.
• LOGGERHEAD a stupid, dull-witted, or mulish person; a blockhead, a dunce ...1806 Amer. dial.
• LOGI-LOGI a stupid, oafish person ...1950s W. Indies sl.
• LOG OF EBONY a stupid Black person ...M19 Aust. sl.
• LOG OF WOOD a dull, stupid person ...M19 Aust. sl.
• LOGO-LOGO a stupid, oafish person ...1950s W. Indies sl.
• LOLO a crazy person; a dull, stupid person ...1938 Amer. dial.
• LOMMIX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LOPPUS an oaf, a stupid person ...20C sl.
• LORG a stupid person; an oaf ...E20 US sl.
• LUMMIX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOCK(S) a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOKIN a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMOX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUMMUX a large, heavy, or clumsy person; an ungainly or stupid lout; a fool ...M19 sl.
• LUNCH a dull, stupid person; a fool ...1960s US college sl.
• LUNCHIE a dull, stupid person; a fool ...1960s US college sl.
• LUNCHMEAT a stupid, contemptible person ...1970s US college sl.
• MA BELL a dimwit; a nincompoop; a stupid person ...Bk1972 homosexual sl.
• MACAROON † a buffoon; a stupid or foolish person; an affected blockhead; a ridiculous or doltish person ...a1631 
• MACKEREL a worthless, stupid or foolish fellow ...1863 Amer. rhyming sl. for 'prat' (Mackerel and Sprat) 
• MALLETHEAD a fool, a stupid person, a numbskull ...1954 US sl.
• MALT-HORSE † a term of reproach or abuse for a dull, stupid fellow; a dolt ...1590
• MAMMY-GOG a foolish, stupid person ...1884 Eng. dial.
• MAMMY-SUCK a foolish, stupid person ...Bk1905 Eng. dial.
• MARBLE DOME a dolt, a dullard, a stupid person ...1919 Amer. sl.
• MARBLEHEAD a dolt, a dullard, a stupid person ...1919 Amer. sl.
• MAROON an obnoxious or foolish person; a stupid person  ...1941 Amer. sl.
• MATHUM a fool, a stupid person; a blockhead ...Bk1905 Eng. dial.
• MAUPS, MAWPS a stupid person ...1866 Eng. dial.
• MAWSIE a stout person, esp. a woman; a stupid, slovenly, worthless woman ...1790 Sc.
• MAYTHEM a "May-gosling," a person befooled on the 1st of May; a stupid person ...1864 Eng. dial.
• MAZICAN a stupid person; a fool ...Bk1905 Eng. dial.
• MEATHEAD an oaf; a stupid person ...M20 US colloq.
• MEATHUM a fool, a stupid person; a blockhead ...Bk1905 Eng. dial.
• MEAZY-SOW a stupid person ...1857 Eng. dial.
• MELL a big, strong, stupid person ...Bk1905 Sc.
• MELLSCOPE a confirmed dunce; a wooden-headed or stupid person ...Bk1905 Eng. dial.
• MELONHEAD a blockhead; a stupid person ...1932 Amer. sl.
• MENTAL HERNIA a fool; an idiot; an oaf; a stupid person ...1970 Amer. sl.
• MENTAL MIDGET an absent-minded or inattentive person; a stupid person ...1966 Amer. sl.
• MESS an objectionable or foolish person; unruly or incorrigible person; an oaf; a hopelessly stupid person; a mentally confused person ...1936 sl.
• MICKEY MOUSE a stupid person, esp. a White person or a police officer ...1941 US sl.
• MINCH a stupid, contemptible, or unpleasant person ...1928 Amer. sl.
• MINDLE a stupid girl ...2003 UK sl.
• MISSING LINK a stupid person ...20C US sl.
• MOKE a stupid fellow, a dolt, a blockhead; a foolish or inconsequential fellow ...1855 Eng. dial. & sl.
• MOKES a foolish or inconsequential fellow; a stupid fellow ...1985 Amer. sl.
• MOKIE a stupid, silly lout ...1903 Sc.
• MOLDWARP a stupid, worthless, or good-for-nothing person; a senseless person; a dolt ...1928 Amer. dial.
• MOME †* a fool, a stupid or silly person; a blockhead, a simpleton; a dull, ignorant person; a dolt ...1550 
• MOMO a stupid or useless person; a blockhead ...1953 Amer. sl.
• MONGIE a stupid person ...Bk2004 Brit. sl.
• MONGOLOID a stupid, dumb person; an uncultured person ...1978 sl. 
• MONKEY DICK a stupid or contemptible person ...1988 Amer. sl.
• MONKEY-FACE a stupid, ugly person; also, a term of address ...1895 sl.
• MOOK (derogatory) a term of abuse; an incompetent, ineffectual, foolish, or stupid person; a contemptible person (esp. with reference to low social status) ...1930 US & Caribbean colloq.
• MOON-CALF a dolt; a stupid fellow ...1627 colloq.
• MOOSIE, MOOSY a person of soft intellect, an idiot, a fool, a blockhead, a stupid person ...Bk1905 Eng. dial.
• MOOTCH a slow, stupid person ...Bk1910 Ireland 
• MOOZLES a slow, stupid, slovenly person ...1847 Eng. dial.
• MOPE a fool, a stupid person, a simpleton; a dolt, an oaf; a dullard; a slow-witted or inept person ...c1390
• MOPOKE a stupid, ineffectual, or tiresome person; a slow or lugubrious person; a fool; often used as a term of abuse ...1845 chiefly Aust.
• MOP-STICK †* a stupid person; a fool; an idiot ...1882 sl.
• MOPUS † a simpleton; a dull, inactive, stupid, or ineffectual person; a worthless person; a dreamer ...a1635 obs. exc. Eng. dial.
• MOREPORK a stupid or tiresome person; a fool; often used as a term of abuse ...1845 Aust. colloq.
• MOREPORK KIND OF A FELLOW a stupid or tiresome person; a fool; often used as a term of abuse ...1845 Aust. colloq.
• MORON a stupid or slow-witted person; a fool; an idiot; a feeble-minded person; a dunce ...1917 colloq., orig. US
• MORTWORP a stupid, worthless, or good-for-nothing person; a senseless person; a dolt ...c1938 Amer. dial. 
​• MOULDWARP a stupid, worthless, or good-for-nothing person; a senseless person; a dolt ...1928 Amer. dial.
• MOUTH-BREATHER a stupid person; a fool ...1915 Amer. sl.
• MUCKLE AUMRIE a very stupid person ...B1900 Sc.
• MUD a fool; an oaf; a stupid person ...18C Brit. colloq.
• MUDCAT a stupid or contemptible person ...M19 US sl.
• MUDDLE-HEAD a fool; a simpleton; a stupid person; an oaf  ...M19
• MUD-HEAD an oaf; a fool; a stupid person ...E19 colloq.
• MUFF an oaf, a fool, a stupid person ...1682 cant
• MUG a stupid or incompetent person; a fool or simpleton; a gullible person, a dupe ...1857 colloq.
• MULLETHEAD a fool, a stupid person ...1857 US sl.
• MUMMYDIDDLE a stupid, silly person; a foolish person ...Bk1903 Eng. dial.
• MUSHBALL a stupid person; a dolt; a mawkishly sentimental person ...1980s US sl.
• MUSHBRAIN a stupid person; a dolt; a mawkishly sentimental person ...1980s US sl.
• MUTT an oaf; a dullard; a stupid person ...20C US sl.
• MUTTHEAD a stupid or contemptible person ...1910s US sl.
• MUTTON-HEAD a dull, stupid person; an uninteresting person, a bore ...1825
• NAFFHEAD a stupid person, a blockhead, a simpleton, an idiot, a dolt ...1796 Eng. dial.
• NAGO a very stupid, ugly, or notably dark-complexioned person ...1940s W. Indies sl.
• NAILHEAD a dull, stupid person; a fool ...1948 Amer. sl.
• NAUPHEAD a stupid person ...Bk1905 Eng. dial.
• NEEP-HEAD a stupid person ...1880 Sc.
• NEWT a stupid, unsophisticated or socially inadequate person ...1920s US college sl.
• NIMWIT a dull, stupid person ...1968 Amer. dial.
• NING-NANG a worthless or troublesome person; an unreliable person; a silly or stupid person; a fool ...1832 Eng. dial.
• NINGNONG a fool, an idiot, a stupid person ...1832
• NINNYHAMMER a stupid or weak-minded person; a simpleton, a fool ...1592
• NO-NECK a muscular, stupid man ...Aust. sl.
• NONG a fool, a simpleton; a stupid or incompetent person ...1944 Aust. & NZ sl.
• NONG-NONG an oaf; a dolt; a stupid person ...M20 Aust. sl.
• NONNY-NONNY an oaf; a blockhead; a stupid person ...19C Brit. sl.
• NOODLE a silly, stupid, unthinking, or forgetful person ...Bk1974 Amer. colloq.
• NOODLEHEAD a stupid person ...Bk1995 US sl.
• NOSEBLEED a stupid, inept person ...1951 US teen sl.
• NUMB CREATURE a fool, a stupid person ...1941 Amer. dial.
• NUMB NUT a fool, a stupid person ...1966 Amer. dial.
• NUMBHEAD a fool, a stupid person ...1941 Amer. dial.
• NUMBSKULL a fool; a blockhead; a dull-witted person; a dunce; a dolt; a stupid fellow ... 17C
• NUMBY a fool, a stupid person ...1966 Amer. dial.
• NUMP a dolt; an oaf; a silly or stupid person; a fool; a blockhead ...17C Brit.
• NUMPS † a silly or stupid person; a fool, a blockhead, a dolt ...1611 obs. exc. Eng. dial.
• NUMSCUL a blockhead; a stupid person ...17C
• NUMSKULL a fool; a blockhead; a dull-witted person; a dunce; a dolt; a stupid fellow ... 17C
• O a stupid or silly fellow; a softy ...Bk1880 Eng. dial.
• OAF a fool; a stupid fellow; a blockhead; an idiot' an awkward, blundering lout; the clown of a circus ...1638
• OBSTUPEFACT †* a stupid person ...1601
• ODDMENT one slightly defective in mental power; a stupid person ...Bk1905 Eng. dial.
• OMADAUN a stupid person; a simpleton, a fool; a lazy, good-for-nothing fellow ...1843 Ireland
• OMADHAUN a fool, a simpleton; a dull, stupid person; a term of abuse ...1818 Ireland
• ONE-BRAIN a term of disparagement; a stupid person ...1916 Amer. dial.
• OOFUS a stupid oaf ...M20 US sl.
• OOK a jerk, a fool, a stupid person ...1949 Amer. sl. 
• OYSTER an odd, stupid, or foolish person ...1930s US sl.
• PADDICK a stupid, senseless person ...Bk1895 Eng. dial.
• PAIFERAL a stupid fellow ...Bk1905 Sc.
• PALOOKA a large and stupid person ...1920s US sl.
• PALOOKO a large and stupid person ...1920s US sl.
• PARTAN a term of abuse or ridicule; an ugly or bad-tempered person, a stupid person ...1896 Sc. & N. Eng. dial.
• PAWCHLIE a stupid person, a simpleton; a silly person of low stature ...1824 Sc. 
• PEABRAIN a stupid person ...Bk1995 US sl.
• PEASANT someone considered ignorant, stupid, or awkward; an uncouth or uncultured person ...1943 colloq.
• PECKERHEAD a disparaging term for a person; a thick-headed or stupid person; a jerk, an oaf; a despised man ...1955 Amer. dial.
• PECKERWOOD a disparaging term for a person; a thick-headed or stupid person ...1986 Amer. dial.
• PIECE OF WOOD, A † a contemptuous term for a stupid person; a blockhead ...1705
• PILLOCK a stupid or annoying person ...14C Brit. sl.
• POINTHEAD a stupid person ...1972 Amer. sl.
• POINTY-HEAD a stupid person ...1972 Amer. sl.
• POKE a stupid, boring, slow, or plodding person; a lazy person; a dawdler; a bore; a worthless fellow ...1844 Amer. dial. 
• PORKHEAD a stupid, thuggish person ...1980s sl.
• POTATOHEAD a fool, a simpleton, a stupid person, a dunce, an oaf ...1952 Amer. sl.
• POTHEAD a fool; a blockhead; a stupid person ...1825 sl.
• POT-WALLOPER (derogatory) a fool, a stupid person; also, an impostor, an upstart ...1820
• PUDDENHEAD an oaf ...19C Brit. & US colloq.
• PUDDING-HEAD a stupid but lovable person ...Bk1974 Amer. sl.
• PUMBLECHOOK a stupid person; a fool; an oaf; a 'human ass' ...L19 Brit. & US sl.
• PUMPKIN-HEAD a stupid person ...1850 Amer. colloq.
• PUNKIN-HEAD a stupid person; an oaf or dolt ...19C Amer. dial.
• PUTTY-HEAD a fool; a stupid person ...1905 Amer. dial.
• QUAD a very clumsy, stupid person - an inept fool ...1977 US college sl. 
• QUASHEE, QUASHIE a country bumpkin; a peasant; a stupid person ...M19 sl.
• QUAW a stupid, ugly person; a peasant or bumpkin ...M19 W. Indies sl.
• QUAWY a stupid, ugly person; a peasant or bumpkin ...M19 W. Indies sl.
• RAFE a fool, a stupid person ...Bk1904 Eng. dial.
• RAM-HEAD † one who has a head like a ram; a dull, thick-witted, obstinate person; a stupid person, a blockhead ...1605
• RAMMLEGAUCUS † a stupid, blundering fellow ...1923 Sc.
• RATTLE a giddy, harebrained person; one who talks volubly; a chatterer; a stupid fellow ...B1900 Sc. & Eng. dial.
• RATTLE-BRAIN. a confused, silly, or stupid person; a wild, harum-scarum person; a spendthrift ...B1900 Eng. dial.
• RIDGE RUNNER a rustic, esp. a mountaineer; an uncouth, stupid fellow; a hillbilly ...1917 Amer. dial.
• RODNEY a stupid or awkward person ...M19 Eng. dial. & colloq.
• SACK a term of contempt for a man; a stupid, dull fellow ...1835 Sc.
• SACKET a stupid person or animal ...1889 Sc. & Eng. dial.
• SAINT-AGNES TÔTLE a stupid old fool ...Bk1904 Eng. dial.
• SAMMY BILLY a simpleton; a foolish, stupid person ...Bk1887 Eng. dial.
• SAMMY CODLIN a simpleton; a foolish, stupid person ...1889 Eng. dial.
• SAMMY DAWKIN a simpleton; a foolish, stupid person ...1879 Eng. dial.
• SAMMY DINGLE a simpleton; a foolish, stupid person ...Bk1887 Eng. dial.
• SAMMY NODDY a simpleton; a foolish, stupid person ...Bk1875 Eng. dial.
• SAMMY SUCK-EGG a simpleton; a foolish, stupid person ...Bk1896 Eng. dial.
• SAMMY-HEAD a simpleton; a foolish, stupid person ...Bk1904 Eng. dial.
• SAO a repulsive, disagreeable, dishonest, or stupid person ...1960s Amer. Vietnam War usage
• SAP a stupid person; a fool; one easily taken advantage of ...1817 sl.
• SAPE a stupid person ...Bk1880 Eng. dial.
• SAPEY a stupid person ...Bk1880 Eng. dial.
• SAP-HEAD a fool; a simpleton; a stupid person; a blockhead ...1798
• SAPPY a fool; a simpleton; a stupid person; a blockhead ...1868 Eng. dial.
• SARDINE a term of reproach or abuse; a fool; a simpleton; a stupid fellow; a dullard ...1857 US sl. 
• SATEPOLL a foolish, silly, or stupid person; a simpleton ...1867 Eng. dial.
• SAUSAGE any dull, stupid person; an oaf; one who is as alert as a real sausage ...Bk1975 Amer. sl. 
• SAWDUST-HEAD a stupid person; a blockhead; someone whose brains are more useless than sawdust ...20C US colloq.
• SAWNEY a simpleton, a fool, a stupid fellow; a soft, good-natured fellow ...a1700 colloq.
• SAWNUPS a stupid person ...Bk1904 Eng. dial.
• SCAFFOLD BOARD said of a person with low intelligence ...Brit. sl.
• SCHLEP(P) an idler, a worthless or ineffectual person; an oaf, a slob, a jerk, a stupid or awkward person ...1939 Amer. dial.
• SCHLEPPER an idler, a worthless or ineffectual person; an oaf, a slob, a jerk, a stupid or awkward person; an insignificant person; a second-rater ...1947 sl. orig. US
• SCHMEKEL an oaf; a stupid person ...M20 sl.
• SCHMENDRICH a stupid person; an oaf; an immature male; a nonvirile male; used derisively by women ...20C US sl.
• SCHMOCK a stupid person; a fool; oaf; ...20C US sl.
• SCRUB a fool, a stupid person, a dumb individual ...1980s US Black sl.
• SEMOLIA a fool; a stupid person ...1890s US Black sl.
• SHEEPHERDER (usually derogatory) a lazy, stupid person ...1930 Amer. dial.
• SHEEPSHEAD † a foolish or stupid person
• SHIT-FOR-BRAINS a stupid person ...sl., chiefly N. Amer.
• SHLEPP an idler, a worthless or ineffectual person; an oaf, a slob, a jerk, a stupid or awkward person ...c1970s Amer. dial.
• SHLEPPER an idler, a worthless or ineffectual person; an oaf, a slob, a jerk, a stupid or awkward person ...1934 Amer. dial.
• SHMENDRICK n. a stupid person; an oaf; an immature male; a nonvirile male; used derisively by women ...20C US sl.
• SILLY ASS a foolish or stupid person
• SILLY MOO a stupid woman ...L19 sl.
• SIMP a fool, a simpleton, an oaf, a stupid or dull person; a dim-witted or backward person ...c1910 sl., orig. US
• SKIT-BRAINS a stupid person, a blockhead, a dolt ...1553
• SLAB-SIDES a stupid person ...M19 US sl.
• SLACK JAW a dolt, a stupid person ...1994 US sl.
• SLOWCOME a slow person; a lagging, stupid, lazy fellow; a lazy, sluggish fellow; an idler ...1882 Eng. dial.
• SNODDIE an ignorant, stupid fellow ...B1900 Sc.
• SPACK a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• SPACKA a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• SPACKER a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• SPACKO a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• SPADGE a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• SPAG an unpleasant, stupid person; can be used affectionately; a term of address for a female friend...1983 US college & UK juvenile sl.
• SPAGGA an unpleasant, stupid person; can be used affectionately ...2001 US college & UK juvenile sl.
• SPAGHETTI HEAD a stupid person ...1987 US sl.
• SPANGLE a fool; a very stupid person ...2001 Sc. juvenile sl.
• SPANNER a fool; a stupid person; an idiot ...1987 sl.
• SPANNER-HEAD a fool; a stupid person; an idiot ...1990 Aust. sl.
• SPAS, SPAZ, SPAZZ (derogatory) a spastic person; an ineffectual or incompetent person; a fool; an idiot; a stupid person; a clumsy, unattractive person ...1965 sl.
• SPASTIC (offensive) one who is uncoordinated, ineffectual, or incompetent; a fool; an idiot; a stupid person; a clumsy, unattractive person ...1968 sl.
• SPAZMO a term of abuse; an incompetent person; a stupid or unpleasant person ...1998 sl.
• SPAZ-WIT a fool, an idiot, a stupid person .,..1998 UK sl.
• SPINEY BIFF (derogatory) a stupid or clumsy person ...c1980s playground sl.
• SUCK-EGG a fool, a silly person, a stupid fellow ...1609 Eng. dial. & sl.
• SUMPH a soft stupid fellow; a simpleton, a blockhead ...1719 Sc. & N. Eng. dial.
• TACKHEAD a stupid person; a rural farmer ...1836 US sl.
• TACKY a stupid person, a rural farmer ...1836 US sl.
• TACKYHEAD a stupid person; a rural farmer ...1836 US sl.
• TAIVERTY a stupid person ...1833 Sc.
• TAMMIE LAMMAS a stupid person ...1921 Sc.
• TAMMIE NORRIE a stupid, slow-witted, doltish person ...1701 Sc.
• TAM-O'-NORRIE a stupid, slow-witted, doltish person ...1701 Sc.
• TAMPAX a term of abuse; an excessively stupid or unpleasant person ...2001 UK juvenile sl.
• TARD a dolt; a fool; a stupid person ...Bk1994 US teen & college sl.
• TATTIE a stupid person, a simpleton ...1866 Sc.
• TATTIE BOODIE a stupid or cowardly person ...1972 Sc. 
• TATTIE-HEAD a stupid head, a stupid person ...1897 Sc.
• TAVERTY a stupid person ...1833 Sc.
• TAWTIE a stupid person ...Bk1866 Sc.
• TEA-BAGGER one who is left hanging, or looking stupid ...Bk2006 Amer. college & university sl. 
• TIMDOODLE a term of contempt applied to a stupid, silly fellow ...1806 Eng. dial.
• TOM FOOL a foolish or stupid person; one who behaves foolishly ...1721
• TOMMY-NODDY a foolish or stupid person ...1828
• TOM-NODDY a foolish or stupid person; a blockhead, dunce, dolt, simpleton ...1828
• UGMAY a 'sucker', a dupe, a gullible person; a fool, or a stupid person ...1918 US Pig Latin for 'mug'
• UM-CHAW a doltish, naive person; a foolish or stupid person; a dupe, a gullible person ...1910 Pig Latin for 'chump'
• UMPCHAY a doltish, naive person; a foolish or stupid person; a dupe, a gullible person ...1910 Pig Latin for 'chump' 
• UNDERHEAD † a person of inferior intelligence; a stupid person; a blockhead ...1643
• VADGE a general term of abuse; an excessively stupid or unpleasant person ...2001 sl. 
• VAPPE †* a stupid person ...1657
• VATTY-YEAD a stupid person ...Bk1888 Eng. dial.
• VEDGIE (derogatory) a moron; a madman; a stupid person; someone considered mentally deficient or brain damaged ...2001 sl.
• VEG (derogatory) a moron; a madman; a stupid person; someone considered mentally deficient or brain damaged ...2001 sl.
• VEGETABLE a stupid person ...1965 US & Aust. sl.
• VEGGIE, VEGGY (derogatory) a moron; a madman; a stupid person; someone considered mentally deficient or brain damaged ...1989 sl.
• WACKER, WHACKER a fool; a stupid person ...1965 Aust. sl.
• WAHOO a rustic or countrified person; a dull and stupid person ...1882 Amer. dial.
• WALLY a stupid, foolish or inept person; an ineffectual person; a bungler; a moron ...1969 UK sl.
• WANK a simpleton; a stupid person ...1893 Eng. dial.
• WANKY a simpleton; a stupid person ...Bk1877 Eng. dial.
• WANT-WIT one who lacks wit or sense; a stupid person; a fool, a dolt, a blockhead ...1448-9 
• WILLIE GOO a lost-looking or stupid-looking person; a loutish fellow ...1899 Sc. 
• WILL LAPPIN a stupid person ...Bk1905 Eng. dial.
• WILMA an unattractive, ugly, or stupid woman ...1980s US college sl.
• WISE GUY a stupid oaf or smart aleck ...20C US sl.
• WOMBAT a dull, uninteresting or stupid person ...1905 Aust. sl.
• WONK a flunky; a stupid person ...1990s Amer. college sl.
• WONKYBONCE an idiot; also, a nickname for a stupid, thick person ...Bk2004 Brit. sl. 
• WOODENHEAD a blockhead, an oaf; a stupid person ...20C US sl.
• WOODHEAD a dolt; a stupid person ...Bk1903 US sl.
• YACK, YAK a fool; a stupid fellow; an oaf; an innocent person; a dope ...c1920 US sl. 
• YARRA a silly or stupid person ...1967 Aust. & NZ sl.
• YAUNAX a stupid fellow ...Bk1877 Eng. dial.
• YAUP one who has a vacant stupid look; a fool, an oaf, a yokel ...1896 Sc.
• YAWNAX a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNEY a stupid, lazy, sleepy person; a fool ...1876 Eng. dial.
• YAWNEY-BOX a silly person; a lazy, stupid person ...Bk1905 Eng. dial.
• YAWNUP a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNUPS a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNUX a stupid person; a fool; a lazy, uncouth person; a boor ...1870 Eng. dial.
• YAWNY - a fool; a simpleton; a stupid, awkward person ...1777 Eng. dial. 
• YIRN-PUDDIN a term of disparagement for a stupid person; a clot ...1880 Sc.
• YOCHEL a 'yokel'; a stupid, awkward person ...Bk1866 Sc.
• YOCHO a 'yokel'; a stupid, awkward person ...Bk1866 Sc.
• YOCK a stupid fellow; an oaf ...20C US sl.
• YOKEL (usually derogator) a term of contempt for a (stupid or ignorant) countryman or rustic; an uneducated and unsophisticated, gullible person from the countryside; a country bumpkin; a lout; an oaf ...1812
• YORNEY a lazy, stupid person; a fool ...1876 Eng. dial.
• YORNHEAD a silly person; a lazy, stupid person ...Bk1905 Eng. dial.
• YOUE a stupid person of facile disposition (English = ewe) ...Bk1866 Sc.
• YOUNG DUMMILL a stupid or mischievous child ...Bk1893 Eng. dial.
• YOWMAN a stupid, incapable fellow ...Bk1905 Eng. dial.
• YOYO an unpredictable or inconsistent person whose moods and actions go up and down; hence, a fool; an idiot, a dolt; a stupid person; an obnoxious person; an incompetent, or undesirable person; a jerk ...1959 US sl.
• YUCK, YUK a fool; a stupid fellow; an oaf; an innocent person; a rustic ...1943 sl., orig. US
• ZAANEY a very stupid person ...Bk1888 Eng. dial.
• ZAHTY-POLL a stupid, silly, half-imbecile person ...Bk1886 Eng. dial.
• ZANY FROM ALLEGHENY a stupid person ...Bk1945 jive usage
• ZAWKER a dull, stupid fellow ...Bk1882 Eng. dial.
• ZAWNEY a very stupid person ...Bk1888 Eng. dial.
• ZEKE a dull, stupid person; a rustic, a dolt ...1970 Amer. dial.
• ZELDA a girl or woman, esp. if dull or uninteresting; a stupid, boring woman ...1960 US sl.
• ZERK a stupid person; a jerk ...Bk1995 Amer. sl.
• Z-HEAD a stupid person ...1982 US college sl.
• ZIB a nincompoop; a fool, a sucker; an oaf; a stupid person with unknown political or personal opinions ...1934 US sl., chiefly criminals' usage
• ZIPPERHEAD (derogatory) a stupid person; a fool ...1967 US sl.
• ZOMBI, ZOMBIE an extremely dense and stupid person; a boorish or unemotional person ...Bk1958 sl.
• ZOUNDERKITE one whose stupid conduct results in awkward mistakes; a stupid, blundering person ...Bk1876 Eng. dial.
stupid - verbs
• BE HIT WITH THE STUPID STICK to be stupid ...1970s US Black sl.
• BE ON THE WRONG SIDE OF THE HEDGE WHEN THE • BRAINS WERE GIVEN AWAY to be brainless, or stupid, or at the last very dull ...c1810
• BUGGER ABOUT to lounge about; to waste time; to act ineffectually; to behave in a frivolous or stupid way ...1937
• BUGGER AROUND to lounge about; to waste time; to act ineffectually; to behave in a frivolous or stupid way ...1939
• CATCH FARTS WITH A HOOK to do something stupid or useless ...1972 Amer. sl.
• CRACK WALNUTS IN ONE'S ASS to behave stupidly ...1972 Amer. sl.
• DOPE OFF to act in a stupid manner ...World War II Amer. sl.
• DOZZLE † to render stupid; to stupefy, to confuse ...a1670 obs. exc. Eng. dial.
• DUNCIFY * to make a dunce of; to make dull or stupid in intellect ...1597
• EFFATUATE † to besot, to render dull or stupid ...1630
• HAVE A FEW BUTTONS MISSING to be crazy, eccentric, stupid, or less intelligent than average ...1949 Amer. dial.
• HAVE BIRD DROPPINGS FOR BRAINS to be extremely stupid or foolish ...1979
• HAVE BRICKDUST FOR BRAINS to be extremely stupid or foolish ...1800
• HAVE COTTON-BATTING FOR BRAINS to be extremely stupid or foolish ...1901
• HAVE NOTHING BETWEEN THE EARS to be stupid ...Bk1999 Aust. sl.
• HAVE ONE OAR OUT OF THE WATER to be slightly crazy; to be lacking in common sense or intelligence ...1985
• HAVE ONE'S HEAD UP ONE'S ASS to be very stupid or inattentive ...1924 Amer. sl.
• HAVE ONLY FIFTY CARDS IN ONE'S DECK to be stupid or crazy ...1929 US sl.
• HAVE SAWDUST FOR BRAINS to be extremely stupid or foolish ...1833
• HAVE SHIT FOR BRAINS to be extremely stupid or foolish ...1960 sl., orig. US
• HAVE SOUP FOR BRAINS to be extremely stupid or foolish ...1979
• HAVE THE DINGBATS to be mad, stupid, or eccentric ...1918 Aust. & NZ sl.
• HAVE THE QUANDONGS to behave stupidly, to be stupid ...1910s Aust. sl.
• IDIOTIZE to become idiotic or stupid ...? a1800
• MAKE A MONKEY OUT OF to make a fool of, to make someone look stupid ...L19 sl., orig. US
• NOT HAVE BOTH OARS IN THE WATER to be stupid or mentally unbalanced ...1982 Amer. sl.
• PLAY FUNNY-BUGGERS to behave in a stupid way; to deceive or cheat ...Bk1999 Aust. sl.
• PLAY FUNNY BUNNIES to behave in a stupid way; to deceive or cheat ...Bk1999 Aust. sl.
• PUT BEANS IN ONE'S EAR to do something stupid after being warned not to ...1936 Amer. dial.
• PUT BEANS UP ONE'S NOSE to do something stupid after being warned not to ...1979 Amer. dial.
• 7SUMPH to be stupid ...a1689 Sc.
stupid - phrases
• CAN'T FIND ONE'S BUTT WITH BOTH HANDS (IN BROAD DAYLIGHT) used to denote one is stupid or incompetent ...Bk2006 US sl.
• COULDN'T RUN GUTS FOR A SLOW BUTCHER very slow, stupid ...Bk1999 Aust. sl.
• DOESN'T KNOW IF HE'S/SHE'S ARTHUR OR MARTHA said of someone who is stupid or in a state of confusion ...1964 Aust. & NZ sl.
• DON'T KNOW ENOUGH TO POUND ACORNS IN A WOODPECKER HOLE very stupid ...1923 Amer. dial.
• DON'T KNOW ENOUGH TO POUND SAND IN A RAT-HOLE very stupid ...1912 Amer. dial.
• DON'T KNOW ENOUGH TO POUR CHAMBER LYE OUT OF A BOOT very stupid ...1935 Amer. dial.
• DON'T KNOW ENOUGH TO POUR PISS OUT OF A BOOT very stupid ...1931 Amer. dial.
• DRIVES UPHILL WITH THE CLUTCH SLIPPING of a stupid person ...Bk1999 Aust. sl.
• FEW STUBBIES SHORT OF A SIX-PACK lacking in intelligence, stupid ...Bk1999 Aust. sl.
• HAVE SHIT FOR BRAINS to be stupid; to lack intelligence ...1986 Aust. sl.
• HAVE YOUR HEAD UP YOUR ASS stupid, unaware, uninformed ...1944 US sl.
• HE AIN'T GOT SENSE ENOUGH TO CARRY GUTS TO A BEAR said of someone very stupid ...Bk1913-17 Amer. dial.
• I DIDN'T COME DOWN IN THE LAST SHOWER I'm not stupid; don't take me for a fool ...20C Aust. sl.
• I DIDN'T COME DOWN IN THE LAST SHOWER OF RAIN I'm not stupid; don't take me for a fool ...20C Aust. sl.
• I DIDN'T FALL OFF A CHRISTMAS TREE I'm not stupid; don't take me for a fool ...1940s sl.
• LIFT DOESN'T GO TO THE TOP FLOOR, THE he's slightly crazy or lacking in common sense or intelligence ...1985
• LIGHTS ARE ON BUT NOBODY'S HOME, THE said of a person who is dazed, stupid, or unaware ...1983 Amer. sl.
• MORE BALLS THAN BRAINS said of someone who has more strength than intelligence ...a1890 US sl.
• NOBODY HOME an expression applied to any person thought to be stupid, feeble-minded, inattentive, etc. ...c1915 Amer. sl.
• NOBODY HOME UPSTAIRS said of someone considered to be stupid, feeble-minded, absent-minded, inattentive, etc. ...1951 Amer. dial.
• NOT ALL HIS DOGS ARE BARKING simple-minded, stupid ...Bk1999 Aust. sl.
• NOT ENOUGH SENSE TO BELL A BULL said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO BELL A BUZZARD said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO BELL A BUZZER said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO BELL A CAT said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO BELL A COW said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO BELL A GOOSE said of one who seems very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO POUR PISS OUT OF A BOOT WITH THE DIRECTIONS ON THE HEEL very stupid ...1965 Amer. dial.
• NOT ENOUGH SENSE TO POUR SKIM MILK OUT OF A RUBBER BOOT very stupid ...1978 Amer. dial.
• NOT ENOUGH SENSE TO POUR WATER OUT OF A BARREL very stupid ...1965 Amer. dial.
• NOT KNOW ONE'S ARSE (ASS) FROM A HOLE IN THE GROUND to be ignorant, stupid, or confused ...1936 Amer. sl.
• NOT KNOW ONE'S ASS FROM A HOT ROCK to be ignorant, stupid, or confused ...1939 Amer. sl.
• NOT KNOW ONE'S ASS FROM A JUG OF APPLE CIDER to be ignorant, stupid, or confused ...1972 Amer. sl.
• NOT KNOW ONE'S ASS FROM A MUSKET to be ignorant, stupid, or confused ...1862 Amer. sl.
• NOT KNOW ONE'S ASS FROM A PITCHFORK to be ignorant, stupid, or confused ...1985 Amer. sl.
• NOT KNOW ONE'S ASS FROM A RIFLE BARREL to be ignorant, stupid, or confused ...1972 Amer. sl.
• NOT KNOW ONE'S ASS FROM A STALK OF BANANAS to be ignorant, stupid, or confused ...1939 Amer. sl.
• NOT KNOW ONE'S ASS FROM A WIND SCOOP ABOUT SHIP'S WORK to be ignorant, stupid, or confused ...1958 Amer. sl.
• NOT KNOW ONE'S ASS FROM ICE CREAM to be ignorant, stupid, or confused ...1983 Amer. sl.
• NOT KNOW ONE'S ASS FROM MAMMOTH CAVE to be ignorant, stupid, or confused ...1947 Amer. sl.
• NOT KNOW ONE'S ASS FROM ONE'S AILERON to be ignorant, stupid, or confused ...1969 Amer. sl.
• NOT KNOW ONE'S ASS FROM ONE'S ARMPIT to be ignorant, stupid, or confused ...1962 Amer. sl.
• NOT KNOW ONE'S ASS FROM ONE'S ELBOW to be ignorant, stupid, or confused ...1897 sl.
• NOT KNOW ONE'S ASS FROM ONE'S LEFT FOOT to be ignorant, stupid, or confused ...1966 Amer. sl.
• NOT KNOW ONE'S ASS FROM PORK SAUSAGE to be ignorant, stupid, or confused ...1970 Amer. sl.
• NOT KNOW ONE'S ASS FROM THE BACK SIDE OF A CHECKER BOARD to be ignorant, stupid, or confused ...1972 Amer. sl.
• NOT KNOW ONE'S ASS FROM THIRD BASE to be ignorant, stupid, or confused ...1955 Amer. sl.
• NOT KNOW ONE'S BRASS FROM ONE'S OBOE to be very ignorant; to be stupid ...
• NOT KNOW THE FRONT END OF A CAMERA FROM ONE'S ASSHOLE to be very stupid ...1949 Amer. sl.
• NOT KNOW TOODLUM SQUAW said of a stupid person ...1968 Amer. dial.
• NOT MUCH UP TOP said of a stupid person ...1961 sl.
• NOT TO KNOW A BEE FROM A BULL'S FOOT to be ignorant or stupid ...1812 Amer. dial.
• NOT TO KNOW ANKLES FROM ELBOWS said of a person who seems to be very stupid ...1968 Amer. dial.
• NOT TO KNOW BEANS FROM A BULL'S FOOT to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM APPLE BUTTER to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM BARLEY to very stupid; to lack common sense ...1954 Amer. dial.
• NOT TO KNOW BEANS FROM BARLEY IF THE BAGS WERE OPEN to be very stupid; to lack common sense ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM BULLFOOT ABOUT BISCUITS to be very stupid ...1982 Amer. dial.
• NOT TO KNOW BEANS FROM BULLFROGS to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM BUTTER to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM BUTTONS to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEANS FROM PEAS to be very stupid ...1966 Amer. dial.
• NOT TO KNOW BEANS FROM PEAS WHEN THE PADS ARE OPEN to be very stupid ...1966 Amer. online
• NOT TO KNOW BEANS WHEN THE BAG'S OPEN to be very stupid ...1876 Amer. dial.
• NOT TO KNOW BEANS WHEN THE BAG'S UNTIED to be very stupid ...1917 Amer. dial.
• NOT TO KNOW BEANS WHEN THE POD'S OPEN to be very stupid ...1966 Amer. dial.
• NOT TO KNOW BEANS WITH THE SACK OPEN to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEEF FROM BULL'S FOOT to be very stupid ...c1950 Amer. dial.
• NOT TO KNOW BEEF FROM BUTTER to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEEF FROM THE BULL'S TAIL to be very stupid ...1965 Amer. dial.
• NOT TO KNOW BEESWAX FROM BULL FOOT to be ignorant or stupid ...1966 Amer. dial.
• NOT TO KNOW ONE'S ARSE FROM ONE'S ELBOW to be ignorant; not to possess the most rudimentary knowledge; very stupid ...1965 Amer. dial.
• NOT TO KNOW ONE'S ASS FROM ONE'S ELBOW to be ignorant; not to possess the most rudimentary knowledge; very stupid ...1965 Amer. dial.
• NOT TO KNOW ONE'S ASSHOLE FROM ONE'S ELBOW to be ignorant; not to possess the most rudimentary knowledge; very stupid ...1965 Amer. dial.
• NOT TO KNOW PEAS to be very stupid ...1965 Amer. dial.
• ONE SANDWICH SHORT OF A PICNIC stupid, lacking in intelligence ...1985 sl.
• PICK UP YOUR FACE response to somebody who has just done something stupid or embarrassing  ...Bk1998 teen sl.
• SNAG SHORT OF A BARBIE lacking in intelligence, stupid ...Bk1999 Aust. sl.
• TAP FOR THE SIMPLES refers to a stupid person; the idea is that a hole in the skull might let some of the foolishness out ...1953 Amer. dial.
• YOU COULDN'T FIND YOUR ARSE WITH BOTH HANDS you are stupid ...1999 UK sl.
• YOU NEED YOUR HEAD EXAMINED addressed to someone who has said or done something stupid ...1942 US sl.
• YOU WANT YOUR HEAD EXAMINING addressed to someone who has said or done something stupid ...1942 US sl.
 
STUPIDITY - nouns
• ASS-FAULT extreme stupidity ...1990s US campus sl.
• BEEF-WITTEDNESS stupidity ...1863
• BESTIALITY want of intelligence; irrationality, stupidity, brutality ...c1374
• BOOBERY stupidity ...Bk1942 Amer. sl.
• BOOBISHNESS stupidity ...Bk1942 Amer. sl.
• CHUCKLEHEADEDNESS stupidity ...Bk1942 Amer. sl.
• DAFF † folly, stupidity ...1728 Sc.
• DASTARDLINESS † inertness or dullness of wit; stupidity ...1553
• DASTARDNESS † inertness of understanding; stupidity; dullness ...1552
• DUMB ASS stupidity ...1972 US sl.
• FANDANGLE stupidity, foolishness ...1940s W. Indies sl.
• FAT BRAINS stupidity ...Bk1942 Amer. sl.
• FATUITY folly, silliness, stupidity; infatuation ...1648
• FATUOSITY †* folly, silliness, stupidity; infatuation ...1681
• FATUOUSNESS besotted foolishness, stupidity, infatuation; imbecility ...1874
• GROUT-HEADRY † stupidity ...1600
• JACKASSERY gross folly or stupidity ...1833
• JACKASSISM gross folly or stupidity ...a1845 nonce word
• JINGLEBRAINS stupidity ...Bk1942 Amer. sl.
• LAME BRAINS stupidity ...Bk1942 Amer. sl.
• LEATHER-HEADEDNESS stupidity; foolishness ...1879 Amer. dial.
• MOPERY incompetence, stupidity ...1907 US sl.
• MUSHBALL stupidity ...1980s US sl.
• MUSHBRAIN stupidity ...1980s US sl.
• MUZZINESS stupidity ...Bk1942 Amer. sl.
• NITWITTEDNESS stupidity ...Bk1942 Amer. sl.
• NITWITTISM stupidity ...Bk1942 Amer. sl.
• NUMSKULLEDNESS stupidity ...Bk1942 Amer. sl.
• NUMSKULLERY stupidity ...Bk1942 Amer. sl.
• NUMSKULLISM stupidity ...Bk1942 Amer. sl.
• NUT ROLE an instance of feigned insanity or stupidity ...1967 Amer. Black sl.
• OBTUSITY obtuseness; dullness, insensibility, stupidity ...1823 
• OKEY-DOKE foolishness; stupidity; pretense ...1969 sl., esp. Black usage
• P.O. PRUNE a personification of stupidity and incompetence ...1895 Royal Air Force sl.
• SAPPINESS stupidity ...M19 US sl.
• SAWDUST BRAINS stupidity ...Bk1942 Amer. sl.
• SCRAMBLED BRAINS stupidity ...Bk1942 Amer. sl.
• SUMPHISHNESS stupidity, dullness of intellect ...1846 Sc. & Eng. dial.
• TAIVERTNESS stupidity ...1913 Sc.
• VAINNESS † foolishness; stupidity ...1591
stupidity - person
• ANTISOCORDIST †* an opponent of sloth or stupidity ...a1680
stupidity - verbs
• UNBESOT * to free from dullness or stupidity ...1603
stupidity - phrases 
• IF HIS BRAINS WERE BELLS, THEY WOULDNT' MAKE HIS EARS RING underlines the absolute stupidity or inadequacy of the person so assailed ...1920s sl.
• IF HIS BRAINS WERE DYNAMITE, THERE WOULDN'T BE ENOUGH TO BLOW HIS HEAD OFF underlines the absolute stupidity or inadequacy of the person so assailed ...1920s sl.
• IF HIS BRAINS WERE DYNAMITE, THERE WOULDN'T BE ENOUGH TO BLOW HIS NOSE OFF underlines the absolute stupidity or inadequacy of the person so assailed ...1920s sl.
• IF HIS BRAINS WERE GAS, THEY COULDN'T POWER A FLEA'S MOTORCYCLE AROUND THE INSIDE OF A CHEERIO underlines the absolute stupidity or inadequacy of the person so assailed ...1970s US Black sl.
• IF HIS BRAINS WERE MADE OF ELASTIC, THERE WOULDN'T BE ENOUGH TO MAKE A GARTER FOR A CANARY'S LEG underlines the absolute stupidity or inadequacy of the person so assailed ...1990s US Black sl.
 
STUPIDLY - adverbs
• AWVISHLY stupidly, queerly ...1746 Eng. dial.
• BOVINELY in a dull or inert manner; stupidly ...1900
• DAWKINLY stupidly, foolishly ...1750 Eng. dial.
• DUNCISHLY stupidly, unintelligently ...1826
• DUNSTICALLY † in the manner of a dunce; in a dull, pedantic, or stupid way ...1590
• GOOK-EYED stupidly, foolishly, vacantly ...1950s US sl.
• MAZE-LIKE stupidly, foolishly; like a madman ...1866 Eng. dial.
• SUMPHISHLY dully, stupidly ...1802 Sc. & N. Eng. dial.