I
INK - INSIM

INK - nouns
• BLACK WATER ink ...1939 Amer. dial.
 
INKLING - nouns
• INKLE a notion, hint, suspicion, an inkling ...1879 Eng. & Amer. dial.
• ITEM a hint; an inkling; information; a signal; a cue ...1781 Eng. & Amer. dial.
• OBERING a hint, an inkling ...1824 Sc.
• OOM an inkling, suspicion, notion, foreboding ...1880 Sc.
• UMBRAGE † a suspicion, hint, inkling, or slight idea of a matter ...1654-66
inkling - verbs
• MISDOUBT to doubt, to suspect; to fear, to apprehend; to think; to have an inkling or suspicion of ...1877 Sc. & Eng. dial.  
 
IN-LAW - person
• MARRIED-IN an in-law ...1982 Amer. dial.
• OUTLAWS in-laws ...Bk1999 Aust. sl.

INLET - nouns
• CUT a creek or inlet ...1630
• EEL RUT a small inlet partially drained at low tide ...1908 Amer. dial.
• GURNET an ocean inlet or cove ...1890 Amer. dial.
• HAUL a small inlet or recess into which boats from the beach are drawn up for safety ...Bk1902 Eng. dial.
• LAND-FEATHER † a bay or inlet ...c1582
• MINN a mouth, inlet or arm of the sea; a deep hollow in the bottom of the sea; a bay or gulf the water of which is deeper than that of the sea outside it ...1897 Sc.  
• VENT † a creek or inlet ...1604
• VOE an inlet of the sea; a deep bay or long creek; a fjord ...1733 Sc. 
 
INMOST - adjectives
• BENMOST inmost; farthest 'ben' ...Bk1911 Sc.
inmost - nouns 
• MARROW the inmost or central part ...c1400
 
INN - nouns
• ALE-WHISP † the bush hung in front of an inn to show that ale was sold there ...Bk1898 Eng. dial.
• BUVETTE a tavern, a small inn; a refreshment bar or room ...1753
• HARBERGAGE † a place of lodging or entertainment; an inn ...a1300
• HARBERGERY † a place of lodging or entertainment; an inn ...a1300
• HARBOUR † a place of shelter or sojourn; lodgings, quarters, resting-place; a place of entertainment, an inn; a place of refuge, asylum ...c1300 obs. exc. Eng. dial.
• HERBERGAGE † a place of lodging or entertainment; an inn ...a1300
• HERBERGERY † a place of lodging or entertainment; an inn ...a1300
• IND an inn, a public-house ...Bk1902 Eng. dial.
• LAUGHTER n. an alleged name for a company of ostlers (men employed to look after the horses of people staying at an inn) ...1486
• MINCH-HOUSE a small inn or ale-house ...1818 Sc. & N. Eng. dial.
• ORDINARY a tavern or inn ...1637 Amer. dial.
• OSTHOUSE an inn ...Bk1886 Eng. dial.
• SCRAN payment for food at an inn ...18C sl.
• VENT † an inn or tavern ...1577
inn - person  (includes INNKEEPER)
• ADMIRAL OF THE BLUE † a publican; a tapster, an innkeeper; from the colour of his apron ...c1425
• ALE-WIFE a woman who keeps an inn ...Bk1898 Eng. dial.
• ALE-DRAPER † an innkeeper or publican ...1747 Eng. dial.
• BALDERDASH an innkeeper ...1702 sl.
• BEER-MONGER one who provides drink, an innkeeper ...1622
• BONIFACE an innkeeper ...E19 arch.
• DAISY-KICKER the ostler of an inn, esp. a large inn ...c1770 sl.
• JACK BOOTS the 'boots' or bootboy at an inn ...E19 sl.
• OAT-STEALER an ostler (a person who looked after the horses of those staying at an inn) ...Bk1865 sl. 
• OSTLER † an innkeeper ...a1425
• PADRONA the mistress of a household; a woman who keeps a hotel, inn, or brothel ...1744 chiefly in Italian-speaking communities
• PADRONE the proprietor of an inn in Italy ...1678
• QUEER BLUFFER the master of a public house; a sneaking, cut-throat innkeeper ...L17 cant
• QUEER BUFFER a sneaking, cutthroat ale-house keeper or innkeeper ...L17 sl.
• TABERNER one who keeps a tavern; an innkeeper ...1361 Sc.
• TAPPER † one who taps casks or draws liquor; a tavern-keeper, an innkeeper ...a1000 obs. exc. Eng. dial.
• TAPSTER † a woman who tapped or drew ale or other liquor for sale in an inn ...c1000
• TAVERNER one who keeps a tavern; a tavern-keeper, an innkeeper ...a1300 arch.
inn - verbs
• HAIL UP to stay at an inn or similar lodging ...L19 Aust. sl.
 
INNER - adjectives
• BEN inner, interior ...1774 Sc. & N. Eng. dial.
• BENNER inner ...1785 Sc.
 
INNERMOST - adjectives
• BENMOST innermost ...1820 Sc.
• BENNERMOST. innermost ...1790 Sc.
 
INNOCENCE - nouns
• ACACY † innocence, a being free from malice ...Bk1731
• CANDIDNESS † purity, innocence ...1654
• CANDOUR † stainlessness of character; purity, integrity, innocence ...1610
• IRON-DOUBLET innocence ...Bk1896 American thieves' sl.
• SALAD DAYS a period of youthful inexperience and innocence ...1606 UK
• SIMPLESSE † absence of duplicity or guile; innocence, integrity, guilelessness ...1390 obs. exc. arch.
• UNDERINGNESS † harmlessness, innocence ...a1300
• UNLOTHNESS † harmlessness, innocence ...a1225
• VERDANCY innocence, inexperience; rawness, simplicity ...1849
innocence - verbs
• PLAY BABY to act in an infantile manner; to whine or complain; to feign innocence ...1872 Amer. sl.
• PLAY THE BABY ACT to act in an infantile manner; to whine or complain; to feign innocence ...1900 Amer. sl.
innocence - interjections/phrases 
• GREEN AS A YELLOW CABBAGE said of one who assumes ignorance or innocence ...1889 Eng. dial.
• SEARCH ME! expressing innocence or ignorance ...1930s US Black sl.
 
INNOCENT - adjectives
• BALELESS † adj. harmless, innocent ...a1000
• BLUE-EYED innocent ...1929
• CANDID pure, clear; stainless, innocent ...1647 arch.
• CLEAN † guiltless of a charge or accusation; innocent ...a1400
• HARMLESS free from guilt; innocent ...1297 arch.
• ILL-LESS having no evil designs; harmless, innocent ...a1670 Sc.
• INNOCENTIOUS † characterized by innocence, innocent ...1624
• INOFFENSIVE innocent, pure-minded ...Bk1902 Eng. dial.
• SACKLESS without blame or accusation; guiltless, innocent ...1742 Sc. & Eng. dial.
• SAKELESS innocent, not guilty of sin or wrongdoing ...1725 Sc.
• UNFAKEN † guileless, innocent ...c1200
• WHITE morally or spiritually pure; spotless, innocent ...c1175
innocent - person (includes INNOCENT-LOOKING)
• ANGEL a very well-behaved child; a pure, innocent, or morally good person; a person of exemplary virtue or conduct ...1477
• BABE * an adult regarded as being like a child in some way; a childish or foolish person; an inexperienced, naive, or innocent person ...1542
• BABE IN THE WOOD(S) a person likened in some way to the 'babes in the wood', esp. in being an inexperienced, innocent, or naive person in a potentially dangerous situation; usually in plural ...1795
• BABY-FACE a person with a smooth rounded face like a baby's - one with an innocent-looking face - an effeminate man ...a1700 
• BAWKEN a soft or innocent youth ...1890 Ireland
• BUTTERCUP an innocent and naive youth; a young homosexual ...20C Brit. sl.
• DAFFODIL an innocent and naive youth ...20C Brit. sl.
• DAISY an innocent and naive youth; a young homosexual ...20C Brit. sl.
• DOVE a gentle or innocent person; formerly a simpleton ...L16
• HICK a potential victim; a gullible simpleton; an innocent; a stupid, unknowing person; a silly fellow ...1663
• HONEST JOHN a man so trusting and innocent that he may be easily cheated or deceived ...1930 colloq.
• IRIS an innocent and naive youth; a young homosexual ...20C Brit. sl.
• LAMB one who is meek, gentle, innocent, or weak as a lamb ...c1000
ׇ• LILY an innocent and naive youth; a young homosexual ...20C Brit. sl.
• NATURE BOY a naive, innocent man or boy; used ironically ...1948 Amer. sl.
• PANSY an innocent and naive youth ...20C Brit. sl.
• SIMPLICIAN † a simple, ignorant, or innocent person; a simpleton ...1600-9
• SQUARE APPLE an innocent; a naive, gullible person ...1935 US criminals' sl.
• TULIP an innocent and naive youth; a young homosexual ...20C Brit. sl.
• YACK, YAK a fool; a stupid fellow; an oaf; an innocent person; a dope ...c1920 US sl. 
• YOCK a man; a fool, a stupid fellow; an oaf; a chump; an innocent person; a dope; a rustic ...1934 sl.
• YUCK, YUK a fool; a stupid fellow; an oaf; an innocent person; a rustic ...1943 sl., orig. US
innocent - verbs
• QUIT † to clear a suspected or accused person from a charge; to prove one innocent of ...a1300
innocent - phrases 
• WALK LIKE SHE CAN'T MASH ANTS used of a woman, implying that she appears far more innocent than her behaviour suggests she is ...20C W. Indies
 
INNOCENTLY - adverbs
• SAKELESSLY † innocently ...1845 Eng. dial.
• SINCERELY † in a pure or innocent manner ...1578
 
INNOVATION - nouns
• NEWFANGLEDNESS an innovation; a novelty ...1877 Sc.
• NEWFANGLEMENT a modern innovation ...1895 Eng. dial.
 
INNOVATIVE - adjectives
• AVA GARDNER avant-garde, innovative ...1983 Brit. sl.
• CUTTING-EDGE innovative, pioneering ...1975

INNUENDO - nouns
• INSINUENDO innuendo ...Bk1913-17 Amer. dial.
• LEFTY a left-handed compliment; innuendo ...1968 US entertainment industry usage
• MEETH a hint, an innuendo ...Bk1905 Sc.
innuendo - verbs
• RANK to say or do anything that discloses another's guilt in a crime; to deal in innuendo ...20C Amer. sl.
 
INNUMERABLE - adjectives
• LEGION innumerable, multitudinous ...1678
• SANS NUMBER † innumerable ...1550
• UNAIMABLE † too many to be counted, unreckonable, innumerable ...1382
• UNKENNABLE innumerable ...1818 Sc.
• WITHOUT TALLY innumerable ...1860 Eng. dial.
innumerable - phrases 
• THEIR NAME IS LEGION they are innumerable ...1382
 
INOCULATE - verbs
• JAB to inoculate or vaccinate ...1939 Services' colloq.
• NOCULATE to inoculate ...1967 Amer. dial.
 
INOCULATED - verbs
• GET A JAB to be inoculated ...1914 Services' colloq.
 
INOCULATION - nouns
• JAB an inoculation; any form of injection, esp. against diseases such as TB and polio ...1914 sl., orig. military
• PICK an inoculation ...1970 Amer. dial.
 
INOFFENSIVE - adjectives
• SACKLESS simple, inoffensive, harmless; trembling; bashful ...1788 Sc. & Eng. dial.
• SAKELESS of persons, animals, or things: inoffensive, harmless, guileless ...1768 Sc.
 
INOPPORTUNE - adjectives
• IMPORTUNATE † inopportune, unseasonable, untimely ...1529
• IMPORTUNE † inopportune, untimely; unseasonable, unfit ...c1425
• WELCOME AS FROST IN HARVEST, AS very inopportune, inconvenient, or inappropriate ...1897 Sc.
inopportune - nouns 
• IMPORTUNITY † the condition of being unseasonable or inopportune; unseasonableness; an unsuitable time ...1489
 
INOPPORTUNELY - adverbs
• IMPORTUNATELY † inopportunely, untimely, unseasonably ...1529
• IMPORTUNELY † inopportunely, unseasonably ...c1425
 
INQUEST - nouns
• QUEST an inquest ...Bk1905 Eng. dial.
inquest - person
• QUEST-DITER † a quest-monger; one who made a business of conducting inquests ...c1460
• QUEST-GANGER † a quest-monger; one who made a business of conducting inquests ...c1460
• QUESTMONGER † one who made a business of conducting inquests ...1377
 
INQUIETUDE - nouns
• WANREST † a state of inquietude or trouble; unrest ...c1550 Sc.
 
INQUIRE - person
• QUERANT †* one who asks or inquires; one who consults or seeks to learn something by means of an astrologer...1591
• QUERENT one who asks or inquires; one who consults or seeks to learn something by means of an astrologer ...1598
• QUERIST one who asks or inquires; a questioner, interrogator ...1633
• QUEROR †* an inquirer ...a1400
• ZETETIC an investigator, an inquirer; an adherent of the ancient Greek sceptic school of philosophy ...1658
inquire - verbs 
• BACKSPEER to question, to cross-examine, to inquire into a matter ...1808 Sc.
• BACKSPEIR to question, to cross-examine, to inquire into a matter ...1808 Sc.
• BACKSPIER to question, to cross-examine, to inquire into a matter ...1808 Sc.
• ENSPEER †* to ask or inquire ...c1440
• EXPISCATE to 'fish out'; to find out by scrutiny or inquiry; to search out; to discover by laborious investigation or strict examination ...c1611
• HARK to look out; to make inquiries ...Bk1905 Eng. dial.
• HARKEN to seek or hear tidings; to inquire after, to ask for ...1523
• HAVEY-QUAVEY to inquire, to question ...Bk1902 Eng. dial.
• HAWKSHAW to snoop; to inquire ...1946 US sl.
• HEARKEN to seek or hear tidings; to inquire after, to ask for ...1523
• INQUISITE † to inquire into; to investigate, examine; to make inquiry ...1674
• INTERCEDE INTO to inquire or look into a matter ...Bk1902 Eng. dial.
• OF-ASK † to inquire, to ask for; to get or learn by inquiry ...c1000
• PERQUIRE †* to search through, or make diligent search into; to inquire diligently into ...1597
• PERSCRUTE †* to scrutinize thoroughly; to make a thorough search or inquiry; to investigate ...a1545
• QUAERITATE †* to inquire or search into ...1657
• QUARE to inquire ...1816 Eng. dial.
• QUEER to inquire ...1933 Sc.
• QUERE †* to ask, to inquire; to query ...a1300
• QUIRE †* to ask, to inquire ...a1300
• QUIZ to interrogate, to cross-question; to ask inquisitive question; to make prying inquiries ...1848 Sc. & Eng. dial.
• QUIZZET to question; to inquire into, to examine ...1930 Amer. dial.
• QUIZZIT to question; to inquire into, to examine; to ask prying questions ...Bk1905 Eng. dial.
• SALINGE to investigate, to inquire ...1887 Eng. dial.
• SIFT to pry into, to make inquiry ...1590
• SQUIZZIT to question; to inquire into, to examine ...1922 Amer. dial.

INQUIRING, INQUIRY - adjectives
• INQUISITORIOUS †* like an inquisitor; offensively or impertinently inquiring or prying; making strict inquiry; inquisitive ...1641
• PYSMATIC †* interrogatory, questioning, inquiring ...1652
inquiring, inquiry - nouns  (also see ENQUIRE)
• APPOSAL † a searching question; inquiry, investigation, esp. legal examination of accounts ...LME
• HARKENING † inquiry; discovery ...a1483
• HEARKENING † inquiry; discovery ...a1483
• INQUIRATION an inquiry ...1839 Eng. dial.
• OPPOSITION † inquisition, inquiry, examination ...c1540
• QUERISM †* the practice of inquiring or asking ...1648
• QUIRATION an inquiry ...1886 Amer. dial.
 
INQUISITION - nouns
• NOSE an act of casual surveillance or inquisition ...1984 UK sl.
• NOSE AROUND an act of casual surveillance or inquisition ...1984 UK sl.
• NOSEY an act of casual surveillance or inquisition ...1984 UK sl.
• OPPOSITION † inquisition, inquiry, examination ...c1540
 
INQUISITIVE - adjectives
• BACK-SPIERIN' inquisitive ...1897 Sc.
• BEAKY nosy, inquisitive ...2000s sl.
• BETWITCHELLED overcome with inquisitiveness ...19C Eng. dial.
• EMISSITIOUS †* prying, inquisitive, narrowly examining ...1620
• FEISTY nosy, inquisitive ...c1960 Amer. dial.
• GIPSY interfering, irritatingly inquisitive ...20C W. Indies sl.
• GYPSY interfering, meddling, nosy, officious, irritatingly inquisitive ...20C W. Indies sl.
• INQUIROUS †* inquisitive ...1632
• INQUISITE †* inquisitive ...1808
• INQUISITORIOUS †* like an inquisitor; offensively or impertinently inquiring or prying; making strict inquiry; inquisitive ...1641
• INQUISITOUS †* inquisitive ...1658
• MACO inquisitive, gossipy, meddlesome ...20C W. Indies sl.
• MAKO inquisitive, gossipy, meddlesome ...20C W. Indies sl.
• NEBBY nosy, inquisitive, curious, intrusive ...L19 Sc. & Ulster & Amer. dial.
• NEBBY-NOSED nosy, inquisitive, curious, intrusive ...1968 Amer. dial.
• NEWSY of a person: news-loving; inquisitive, prying, nosy, gossipy ...1899 colloq.
• NIBBY snoopy, inquisitive, nosy ...1942 Amer. dial.
• NOSEY-PARKERING being inquisitive ...1960s sl.
• NOSY ENOUGH TO WANT TO KNOW THE INS AND OUTS OF A CHOOK'S BUM said of a prying person; excessively inquisitive or nosy ...Bk1999 Aust. sl.
• PAUKY, PAWKY proud, conceited, impudent, bold, precocious, forward, inquisitive; esp. used of children ...1801 Sc. & Eng. dial.  
• PEERY inquisitive ...c1810 sl.
• PERCONTATORIAL * given to questioning, inquisitive ...1853
• PIKEY nosy, prying, inquisitive ...1959 Amer. dial.
• POKE-NOSE intrusively inquisitive, prying, curious ...1862 Amer. sl.
• POKE-NOSED intrusively inquisitive, prying, curious ...1942 Amer. sl.
• QUEERIN prying, inquisitive ...1933 Sc.
• QUEESITIVE inquisitive ...1866 Sc.
• QUISETING inquisitive ...Bk1905 Eng. dial.
• QUIZZICAL inquisitive, prying ...Bk1905 Eng. dial.
• QUIZZY inquisitive, nosy ...1950s Aust. & NZ sl.
• TABBY interfering, inquisitive, judgemental ...1920s US sl.
inquisitive - nouns  (includes INQUISITIVENESS)
• KEERIOSITY, KIRIOSITY, QUEERIOSITY curiosity, inquisitiveness; a curious or eccentric person or object ...1706 Sc.
• NOSEY-PARKERDOM the condition of an inquisitive nature or a demonstration of invasive inquisitiveness ...1960s sl.
• NOSEY-PARKERISHNESS a tendency towards inquisitive behaviour ...1960s sl.
• NOSEY-PARKERISM the condition of an inquisitive nature or a demonstration of invasive inquisitiveness ...1960s sl.
• NOSEY-PARKERY the condition of an inquisitive nature or a demonstration of invasive inquisitiveness ...1960s sl.
• QUEESITIVENESS inquisitiveness ...Bk1905 Sc.
inquisitive - person 
• BIG-NOSE an over-inquisitive or nosy person ...Bk1988 Aust. sl. 
• EARWIG an inquisitive person ...1880 sl.
• FARTLES an inquisitive, troublesome person ...Bk1900 Eng. dial.
• GIG a detective, or any intrusive person; one who cannot mind his own business, a nosy or inquisitive person; a busybody; an eavesdropper ...1959 Aust. sl.
• GIL a nosy, inquisitive, interfering person; a busybody ...1823 UK sl.
• GIRAFFE an inquisitive or prying person ...1933 US sl.
• GLEG an inquisitive person ...Bk1900 Eng. dial.
• GONGOOZLER an idle and inquisitive person who stands staring for prolonged periods at anything out of the ordinary; orig, at activity on a canal ...1904 Eng. dial.
• JACK NOHI an inquisitive person; a nosey parker ...1940s NZ sl.
• MACO-MAN an inquisitive, gossipy, or meddlesome man ...20C W. Indies sl.
• MACO-WOMAN an inquisitive, gossipy, or meddlesome woman ...20C W. Indies sl.
• NANNY-CRATTY an inquisitive, meddlesome, foolish, weak-minded person ...Bk1905 Eng. dial.
• NEWSY-BREECHES a gossip; a busybody; an inquisitive person ...Bk1905 Eng. dial.
• NOSE-OINTMENT an overly inquisitive, nosey person ...Brit. sl.
• NOSEY, NOSY an inquisitive person ...1930s sl.
• NOSEY BOB an inquisitive person; a nosy parker ...L19 Aust. sl.
• NOSEY O'GRADY an inquisitive person, usually female ...1981 Can. sl.
• NOSEY PARKER, NOSY PARKER an inquisitive person ...1966 sl.
• NUMQUID * an inquisitive person ...1833
• PAKENOSE an inquisitive person ...1893 Eng. dial.
• PEEPING TOM an inquisitive person ...1785 colloq.
• PIKE a nosy, snoopy, or inquisitive person, a prying person ...1959 Amer. dial.
• POKE-NOSE a prying, snoopy, or inquisitive person; a meddler ...1915 Amer. dial.
• QUIDNUNC one who is constantly asking: 'What now?' 'What's the news?'; one who is curious to know everything;  one who pretends to know all that is going on; hence, an inquisitive person; a gossip, a newsmonger ...1709
• QUIZ a prying, inquisitive person ...1885 Eng. dial.
• QUIZCUSS a meddlesome, inquisitive person ...1887 Eng. dial.
• SHORT SNORT an inquisitive youngster ...Bk1942 US sl.
• SPY-WIFE an inquisitive woman ...1898 Sc.
• STARE-CAT a women or girl who amuses herself with gazing at her neighbours; a meddlesome or inquisitive neighbour ...1859 US
• STICKYBEAK a person who pries into the affairs of others; a nosy or inquisitive person ...1917 Aust. & NZ colloq.
inquisitive - verbs
• FAAS to be nosy or inquisitive ...1930s W. Indies sl.
• FASS to be nosy or inquisitive ...20C W. Indies sl.
• NEB to pry; to nose around, to be nosy or inquisitive ...1928 Amer. dial.
• NEB ABOUT to pry; to nose around, to be nosy or inquisitive ...1928 Amer. dial.
• NOSEY-PARK to be inquisitive ...1960s sl.
• NOSY AROUND to go about inquisitively; to idle about ...1940 Amer. dial.
• TOOT † to look inquisitively; to pry ...1390 obs. exc. Eng. dial.
• WANT ONE'S HEAD KAIMED AND THEN CURLED to be too inquisitive (kaimed = combed) ...1928 Sc.
inquisitive - phrases
• ALL UP IN THE KOOLAID wanting to know what is going on, being nosy or inquisitive ...1997 US College & teen sl.
• ARE YOU WRITING A BOOK? reply for someone over-inquisitive ...Bk1942 US sl.
• DO YOU HAVE A BADGE? retort to an inquisitive person ...Bk1942 US sl.

INROAD - nouns
• INGATE an inroad, an attack ...Bk1902 Eng. dial.
 
INSANE - adjectives
• ABRAM insane, crazy ...M16 sl. .
• APARTMENT TO LET unhinged, insane, crazy ...M19 sl.
• APESHIT crazed, infuriated, excited; mad, insane ...1955 sl.
• AROUND THE BEND insane, mad ...1929 sl.
• AROUND THE TWIST insane ...Bk1999 Aust. sl.
• ATTIC TO LET unhinged, insane, crazy ...M19 sl.
• BALMY soft, idiotic, weak-minded; insane ...1851 sl.
• BALMY IN ONE'S CRUMPET insane ...1891 sl.
• BANANAS insane, mad ...1957 sl., orig. US
• BARKING insane, mad ...1968 Brit. sl.
• BARKING MAD insane, mad ...1968 Brit. sl.
• BARMY AS A BANDICOOT insane ...Bk1999 Aust. sl.
• BAT-HOUSE crazy, mad, insane ...20C sl.
• BATS crazy, insane, eccentric ...20C sl.
• BATSHIT crazy, mad, insane ...1984 sl.
• BATTY eccentric, odd, insane, crazy ...1903 US sl.
• BEANY mentally defective, whether feeble-minded or insane ...1914 Amer. dial.
• BENEEK bad-tempered, insane ...1960s S. Afr.
• BLAH insane, mad ...1924 sl.
• BONKERS insane, mad ...1957 sl., orig. Brit.
• BUGGY foolish, silly, witless, crazy, demented, insane, mentally deficient ...1905 Amer. dial.
• BUGGY AS A BEDBUG crazy, insane ...1962 Amer. dial.
• BUGGY AS POTATO VINES crazy, insane ...1962 Amer. dial.
• BUG-HOUSE insane ...Bk1913-17 Amer. dial.
• BUGS foolish, silly, crazy, demented, insane, mentally deficient ...1915 Amer. dial.
• BUSTED UP insane ...1977 US sl.
• COO-COO insane ...Bk2006 US sl.
• CRACKED crazy, insane, mentally unbalanced ...1692 sl.
• CRACKED IN THE FILBERT slightly or very eccentric or insane; crazy ...c1880 Cockneys' sl.
• CRANK insane ...1995 Fiji
• CUCKOO insane ...Bk2006 US sl.
• DAFT of unsound mind, crazy, insane, mad ...1536 chiefly Sc. & N. Eng. dial.
• DIPPY foolish, simple-minded, idiotic, shallow-minded; infatuated, deeply in love; peculiar, mildly insane, crazy ...1899 US sl.
• DOOLALLY insane, mad ...1925 Brit. sl., orig. services' usage
• DOOLALLY TAP insane, mad ...1925 Brit. sl., orig. services' usage
• FANTI crazy, insane ...1910s sl.
• FAR GONE mad, eccentric, insane ...M19 sl.
• FUNNY insane, crazy ...1950s sl.
• FURIOUS † mad, insane ...1475
• GONE TO GOWINGS insane, idiotic ...Bk1999 Aust. sl.
• HALF-AWAY insane ...20C sl.
• LAKES (OF KILLARNEY) insane, mad ...1934 rhyming sl. for 'barmy'
• LIGHT UPSTAIRS eccentric, insane ...1970s US Black sl.
• LITTLE BIT OFF THE TOP. slightly insane ...1910s Aust. sl.
• LOCO crazy, insane, mentally deranged, out of one's mind; obsessed ...1887 Amer. sl.
• LOLO insane, crazy; foolish, dull, stupid ...1938 Hawaii
• LOONEY TUNES insane ...1971 US sl.
• LOONY AS A JAYBIRD insane, eccentric ...1965 Amer. dial.
• MACNOON insane, mad ...1917 Aust. sl., orig. services' usage
• MAD AS A CUT SNAKE insane, crazy ...1932 Aust. sl.
• MAD AS A GUM-TREE FULL OF GALAHS, AS insane, eccentric ...1940s Aust. sl.
• MAD AS A HATTER, AS very mad, utterly insane; in a rage ...M19 sl.
• MAD AS A MEAT AXE, AS completely insane; dangerously crazy ...1920s Aust. & NZ sl.
• MAD AS A SNAKE insane, crazy ...1917 Aust. sl.
• MADPASH † wild, rash, scatterbrained, insane, mad ...1693 
• MAFFLED slightly insane ...Bk1905 Eng. dial.
• MAFFLY slightly insane ...Bk1905 Eng. dial.
• MAGGOTISH crazy, insane ...1990s US sl.
• MAGGOTTY crazy, insane ...1990s US sl.
• MAGGOTY crazy, insane ...1990s US sl.
• MAGNOON insane, mad ...1917 Aust. sl., orig. services' usage
• MAGNUNE insane, mad ...1917 Aust. sl., orig. services' usage
• MANGOON insane, mad ...1917 Aust. sl., orig. services' usage
• MAZED crazed, mad, lunatic, distraught, insane ...1836 Eng. dial.
• MAZEDISH mad, confused, insane ...1846 Eng. dial.
• MAZEDY mad, confused, insane ...Bk1905 Eng. dial.
• MELANCHOLY insane; mad with anger ...Bk1905 Eng. dial.
• MENTAL insane, crazy, out of one's mind ...L19 sl.
• MENTLER crazy, insane ...1990s sl.
• NON COMPOS not in control of the mind, insane, mad ...1628
• NOT ALL THERE eccentric, insane, crazy ...1864 sl.
• NOT QUITE THERE eccentric, insane, crazy ...M19 sl.
• NOT RIGHT IN THE HEAD insane ...1662 euphemism
• NOT RIGHT UPSTAIRS insane, crazy ...1932 sl.
• NUTS insane, crazy, out of one's senses ...1846 Amer. sl.
• NUTSY crazy, insane ...1923 Amer. sl.
• NUTTY AS A CUCKOO crazy, demented, insane ...1922 Amer. dial.
• OFF deranged in mind, insane ...1866 sl.
• OFF AT THE KNOT deranged in mind, insane ...1790 Sc.
• OFF AT THE NAIL deranged in mind, insane ...1897 Sc.
• OFF AT THE SIDE deranged in mind, insane ...1790 Eng. dial.
• OFF HIS KADOOVA off his head, insane ...Bk1892 Aust. sl.
• OFF IT insane, out of one's mind ...M19 sl.
• OFF OF THE SIDE deranged in mind, insane ...1895 Eng. dial.
• OFF ONE'S BAP crazy, insane ...1980s sl.
• OFF ONE'S BASE insane, crazy, confused, muddled, mistaken ...1891 US sl.
• OFF ONE'S BEAN insane, eccentric, crazy; demented ...1940s sl.
• OFF ONE'S BLOCK insane, crazy ...1925 sl., orig. military
• OFF ONE'S BONCE insane, out of one's mind ...M19 sl.
• OFF ONE'S BOX insane; out of one's mind ...1903 Amer. sl.
• OFF ONE'S CAKE crazy, insane ...1980s sl.
• OFF ONE'S CHOMP mad, crazy, eccentric, insane ...M19 sl.
• OFF ONE'S CHUMP insane, mad ...1864 sl.
• OFF ONE'S COCONUT insane, crazy ...19C
• OFF ONE'S CONK mad, crazy, eccentric, insane; demented  ...1870 US sl.
• OFF ONE'S DIP mad, crazy, eccentric, insane ...L19 sl.
• OFF ONE'S DIPPER mad, crazy, eccentric, insane ...L19 sl.
• OFF ONE'S DOT insane, crazy ...19C
• OFF ONE'S DOTTY mad, eccentric, insane, crazy ...L19 sl.
• OFF ONE'S GOURD insane, mad ...1961 US sl.
• OFF ONE'S HEAD insane, crazy, demented ...c1845 sl.
• OFF ONE'S JUMP crazy, insane ...1950s Irish sl.
• OFF ONE'S KADOOVA insane, crazy ...c1870 Aust. sl.
• OFF ONE'S KAZIP insane, eccentric ...1900s US sl.
• OFF ONE'S KERZIP insane, eccentric ...1900s US sl.
• OFF ONE'S KNACKERS insane, stupid ...2000s sl.
• OFF ONE'S KNOCKER mad, insane, uncontrolled ...1900s Aust. sl.
• OFF ONE'S MENTAL RESERVATION insane, out of touch with reality ...L19 US sl.
• OFF ONE'S NANA insane, mad ...1975 sl.
• OFF ONE'S NOB eccentric, insane ...1950s sl.
• OFF ONE'S NOGGIN insane ...1842 Amer. sl.
• OFF ONE'S NUT insane, crazy, out of one's mind ...1858 colloq.
• OFF ONE'S ONION insane, crazy ...1890 Aust. sl.
• OFF ONE'S PANNICAN insane, crazy ...20C Aust. sl.
• OFF ONE'S PANNIKIN insane, mad ...1895 sl., chiefly Aust.
• OFF ONE'S PULLEY insane, eccentric, mad, crazy ...1990s sl.
• OFF ONE'S ROCK crazy, insane, eccentric, mad ...L19 sl.
• OFF ONE'S ROCKER insane, mad ...1897 sl.
• OFF ONE'S ROCKET insane, mad ...1925 sl.
• OFF ONE'S SAUCER mad, insane, eccentric, crazy ...c1930 Aust. sl.
• OFF ONE'S THATCH insane, out of one's mind ...M19 sl.
• OFF ONE'S TILE insane, crazy ...1959 Aust. sl.
• OFF ONE'S TOP insane, crazy ...20C Aust. sl.
• OFF ONE'S TOP TRAVERSE mad, insane, eccentric, crazy ...20C Aust. sl.
• OFF ONE'S TROLLEY insane, mad ...1896 sl.
• OFF THE SIDE insane, mad ...1877 Eng. dial.
• OFF YOUR NANA crazy, insane ...1966 Aust. sl.
• ON A TRIP crazy, temporarily insane ...1960s sl.
• ONE BRICK SHORT OF A LOAD unintelligent, slightly insane, eccentric ...1960s sl.
• ONE BRICK SHY OF A LOAD unintelligent, slightly insane, eccentric ...1960s sl.
• OUT OF ONE'S BOX insane ...1966 Amer. sl.
• OUT OF ONE'S GOURD insane, mad ...1963 US sl.
• OUT OF ONE'S HEAD insane, mad ...1825 sl.
• OUT OF ONE'S SKULL insane, mad ...1968 sl.
• OUT OF ONE'S TREE insane, mad ...1966 US sl.
• OVER THE EDGE insane, quite mad ...1929
• POGGLE insane, mad ...1923 Brit. sl., chiefly services' usage
• POGGLED insane, mad ...1923 Brit. sl., chiefly services' usage
• PORK PIE SHORT OF A BISCUIT, A not completely sane ...1992 UK sl.
• PUDDLED very eccentric; insane ...1936 sl.
• PUGGLE insane, mad ...1923 Brit. sl., chiefly services' usage
• PUGGLED insane, mad ...1923 Brit. sl., chiefly services' usage
• RADGE mad, violently excited, furious, wild, obstreperous, insane ...1923 Sc.
• RADGY of a person or situation: mad, furious, insane ...19C sl.
• RADIO insane, crazy, mad ...1960s rhyming sl. for 'mental' (radio rental)
• RADIO RENTAL(S) wonderful, amazing; insane, mad, crazy  ...1960s rhyming sl. for 'mental'
• RAVERS insane, raving mad ...1938 Brit. sl.
• RED-MAD raging mad, distracted, insane; furious; eager ...1794 Sc. & Eng. dial.
• RENTALS wonderful, amazing; insane, mad, crazy  ...1960s rhyming sl. for 'mental'
• ROUND THE BEND insane, mad, crazy ...1929 sl.
• ROUND THE TWIST insane, mad ...1960 Brit. sl.
• SANDWICH SHORT OF A BISCUIT, A not completely sane, stupid ...1992 UK sl.
• SAVAGE AS A MEAT AXE, AS completely insane ...1920s Aust. & NZ sl.
• SICKO depraved, perverted, insane ...1970s sl.
• STARKERS insane, mad ...1962 Brit. sl.
• TAPPED insane, crazy ...1910s sl.
• TROPPO mentally unhinged as if from exposure to a tropical climate ...1941 Aust. sl.
• UNKED weird, uncanny; insane; ominous of evil; horrid, ghastly, terrible ...1861 Eng. dial.
• UNKERD weird, uncanny; insane; ominous of evil; horrid, ghastly, terrible ...1861 Eng. dial.
• UNKID weird, uncanny; insane; ominous of evil; horrid, ghastly, terrible ...1861 Eng. dial.
• UNSENSED insane, demented, delirious ...Bk1905 Eng. dial.
• UP THE LOOP insane, eccentric ...1950s sl.
• UP THE POLE mad, crazy, eccentric, insane ...1896 UK sl.
• WAMPY mad, insane ...1950s NZ sl.
• WANTING mentally unbalanced, insane ...M19 sl.
• WANTING IN THE UPPER STOREY insane, crazy ...1959 sl.
• WHACKED OUT insane, mad ...1969 US sl.
• WHACKO crazy, eccentric, insane ...1970s sl.
• WRONG silly, foolish; extremely eccentric, or slightly mad, insane ...1920s Aust. sl.
• WRONG IN ONE'S GARRET insane, eccentric ...M19 sl.
• WRONG IN THE UPPER STOREY insane, eccentric, crazy ...M19 sl.
• YARRA mad, insane, stupid, eccentric ...1943 Aust. sl.
insane - nouns
• BUG a deranged thought, an insane idea, an eccentric notion ...1915 Amer. dial.
• FALLING acting insanely ...2000s US Black sl.
insane - person 
• BAKEHEAD a fool, an idiot; a stupid person; an insane or crazy person  ...1949 US sl.
• BATSHIT an insane or crazy person ...1982 sl.
• BETHLEMITE an insane person; a madman; a bedlamite ...Bk1895
• BUG an insane person ...1915 Amer. dial.
• BATSHIT an insane person ...1960s sl.
• CRACKSMOKER a person whose sanity is open to question, whether or not they actually smoke crack ...1997 US sl.
• CRAZY a mad or insane person ...1867 sl., orig. US
• DINGBAT a foolish or stupid person; someone crazy or insane, also, a term of disparagement ...1915 sl.
• FLIP a crazy or insane person ...1961 sl.
• GOOT an insane person ...1936 Amer. dial.
• HEADCASE an insane or very eccentric person ...1970s US sl.
• JACKET JOB something or someone liable to drive one crazy; hence, a mad or insane person ...1990s sl.
• LOCO (derogatory) one who is out of his mind or obsessed; a crazy or insane person ...1852 Amer. dial.
• LOCO BLOSSOM (derogatory) one who is out of his mind or obsessed; a crazy or insane person ...1941 Amer. dial.
• LOONEY, LOONY a mad or insane person ...1884 sl.
• MADPASH † a foolish or insane person; a lunatic, a mad fellow; a crackbrained person; a scatterbrain; a hot-headed person; a rash or turbulent person; a wild, giddy person ...1611 
​• MENTAL an insane, deranged person; a mental patient ...1913 sl.
• MENTAL JOB one who is or potentially might be insane ...1920s sl.
• MISS POINTS one who has lost most of his marbles ...Bk1972 homosexual sl. 
• NAPOLEON n insane man; an eccentric-acting man ...1930s US Black sl.
• NUT a crazy or insane person; an eccentric; a foolish person ...1908 sl.
• NUT JOB an insane or very eccentric person ...1972 Amer. sl.
• NUTTER a violent deranged person; a mad or insane person ...1958 Brit. sl.
• PSYCHO a mad or insane person ...1942 sl.
• SICKIE, SICKY anyone considered to be 'sick in the head', insane, or crazy ...1960s sl., orig. US
• WACK JOB a person who is mentally ill; an eccentric or insane person ...1979 US sl.
insane - verbs
• BAIL OUT to go mad or insane ...1970s sl., orig. military
• BUG OUT to go insane ...1961 US sl.
• CRACK to suffer an emotional breakdown; to become insane ...1917 Amer. sl.
• CRACK ONE'S BRAIN(S) to make oneself insane, to drive mad ...1630
• CRACK UP to become insane ...US Civil War usage
• GO BATSHIT to become insane, to act crazily ...1971 sl.
• GO RAMMISH to be in so violent a rage as to be slightly insane ...Bk1905 Sc.
• HAVE KANGAROOS IN THE TOP PADDOCK to be crazy or insane ...Bk1999 Aust. sl.
• HAVE NITS IN THE NETWORK to be crazy or insane ...Bk1999 Aust. sl.
• HAVE STRAWS IN ONE'S HAIR to be insane, eccentric, or distracted 
• LUNCH to go insane ...1990s US Black sl.
• NOT HAVE ALL ONE'S BUTTONS to be insane, crazy, or unstable ...1860 sl.
• NUT OUT to become insane; to abandon restraint ...1919 Amer. sl., esp. Black
• PLAY WITH THE SQUIRRELS to be confined to a hospital for the insane ...Bk1942 Amer. sl.
insane - phrases
• LIGHTS ARE ON BUT THERE'S NOBODY HOME insane, mentally deficient, vacant ...1970s sl.

INSANE ASYLUM - nouns
• ACADEMY a lunatic asylum ...18C sl.
• BAT HOUSE a psychiatric institution ...1900s US tramps' sl.
• BEDLAM a lunatic asylum, a madhouse ...1663
• BEDLAM-HOLE a mad-house ...1889 Eng. dial.
• BIN, THE a mental hospital ...1938 sl.
• BOOBY-HATCH a mental hospital ...1896 sl., orig. & chiefly US
• BUGHOUSE a mental hospital ...1899 US sl.
• BUZZY HOUSE an insane asylum ...1908 Amer. sl.
• CACKLE FACTORY an insane asylum; a mental hospital; a psychiatric institution ...1940s US sl.
• CALLAN PARK a psychiatric institution ...20C Aust. sl.
• CANARY HATCH a psychiatric institution; a 'loony bin' ...1966 US sl.
• CRACKER FACTORY a psychiatric institution ...1981 US sl.
• CRAZY HOUSE a mental hospital ...1887 US sl.
• CUCKOO HOUSE a mental hospital ...1930 US sl.
• CUCKOO'S NEST a mental hospital ...1962 US sl.
• DAFFY HOUSE a psychiatric institution; an asylum for the insane ...1902 US sl.
• DAFFY JOINT a psychiatric institution; an asylum for the insane ...1908 US sl.
• DARK HOUSE † a place of confinement for a madman; a room used to confine the insane ...1600
• DOWN THE LINE a psychiatric hospital ...1963 NZ sl.
• FARM a psychiatric institution ...1940s US sl.
• FUNNY BIN a psychiatric institution ...20C US sl.
• FUNNY FACTORY a psychiatric institution ...20C US sl.
• FUNNY-FARM an insane asylum; a mental hospital; a psychiatric institution ...1950 sl.
• FUNNY HOUSE a mental hospital ...1906 US sl.
• FUNNY PLACE a psychiatric institution ...20C US sl.
• GIGGLE-HOUSE a mental hospital ...1919 Aust. & NZ sl.
• GREEN CART an imaginary vehicle used to take people to an asylum for the insane ...1935 Aust. sl.
• LAUGHING ACADEMY a mental institution; an insane asylum ...1947 sl.
• LAUGHING FARM a mental institution; an insane asylum ...1965 US sl.
• LAUGHING HOUSE an insane asylum ...1955 US sl.
• LAUGHING SCHOOL an insane asylum ...1966 US sl.
• LOONY BIN a hospital or other institution for the treatment of psychiatric problems and other mental illness ...1919 UK sl.
• LOONY FARM an insane asylum ...1977 US sl.
• LOONY HOUSE a hospital for the insane ...1977 US sl.
• LOONY PEN a hospital for the insane ...1984 US sl.
• MAZE-HOUSE an asylum or madhouse ...1873 Eng. dial.
• MENTAL a psychiatric institution ...1980s Irish sl.
• MONKEY HOUSE an insane asylum ...1958 US sl.
• NUTBOX a mental hospital ...1965 US sl.
• NUT COLLEGE a home or hospital for people with mental illnesses ...c1906 US sl.
• NUT FACTORY a home or hospital for people with mental illnesses ...1900 US sl.
• NUT FARM a hospital for the mentally ill ...1940 US sl.
• NUTHOUSE an insane asylum ...1906 Amer. sl.
• NUTTERY a mental hospital ...1931 sl.
• RAT HOUSE a mental hospital ...1900 Aust. & NZ sl.
• SILLY HOUSE a psychiatric institution ...1960s sl.
• SNAKE-PIT a mental hospital ...1947 sl.
• WACKY HOUSE a psychiatric institution ...1930s US criminals' sl.
insane asylum - person
• BAM-BAM a psychiatric patient ...2000 US prison sl.
insane asylum - verbs
• BUG to confine someone in a psychiatric ward ...1992 US sl.
• JACKET to threaten someone with confinement in a lunatic asylum ...L19 sl.
• PLAY WITH THE SQUIRRELS to be an inmate of an insane asylum ...Bk1934 sl.

INSANELY - adverbs
• BEDLAMLY † like a madman, insanely ...1553-87
 
INSANITY - nouns
• BUGS insanity ...1909 Amer. dial.
• DAFFING mental derangement, insanity ...a1624
• DEEP END the border between sanity and insanity ...1950s Amer. sl.
• LIGHT insanity, craziness ...1950s W. Indies sl.
• LIPEMANIA, LYPEMANIA a form of insanity characterized by extreme mournfulness ...1874
• LYCANTHROPY a kind of insanity in which the patient imagined himself to be a wolf, and had the instincts and propensities of a wolf ...1584
• NUT ROLE an instance of feigned insanity or stupidity ...1967 Amer. Black sl.
• RAGE † madness; insanity; a fit of mania ...c1325 obs. exc. poetic
 
​INSATIABLE - adjectives
• INEXPLEBLE † unable to be filled or satisfied; insatiable ...M16
• OMNIVOROUS taking in everything available, as with the mind; insatiable ...1791
• SATELESS insatiable ...1701 chiefly poetic
• UNGODLY insatiable; nice ...Bk1905 Eng. dial.
insatiable - nouns
• OMNIVORACITY an insatiable appetite for all activities or pursuits ...1889
• OMNIVOROSITY an insatiable appetite for all activities or pursuits ...1896
• OMNIVOROUSNESS an insatiable appetite for all activities or pursuits ...1727
insatiable - person
• GEENOCH a covetous, insatiable person; a greedy person ...1825 Sc.

INSCRIBE - verbs
• RASP † to inscribe by scraping or scratching ...a1300
• SCRIBE to write; to mark, to inscribe ...1787 Sc. & Eng. dial.
• TITLE † to set down in writing; to inscribe, to record, to chronicle ...1340
 
INSCRIBED - adjectives
• LAPIDARIAN executed in stone, inscribed on stone ...1882
• LAPIDEOUS † consisting of or inscribed on stone ...1807
• OPISTHOGRAPHAL † written or inscribed on the back as well as the front ...1684
inscribed - nouns 
• TITLE †* an inscribed pillar, column, tombstone, or the like ...1388
 
INSCRIPTION - adjectives
• LAPIDARY 1. of an inscription, etc.: engraved on stone, esp. monumental stones ...1724
  2. characteristic of or suitable for monumental inscriptions ...1775
• LEGENDED * bearing a legend or inscription ...a1849
inscription - nouns 
• LETTER † anything written; an inscription, document, text; a written warrant or authority ...c1325
• MANUSCRIPTION * the act of writing by hand; that which is written by hand; a written inscription ...1800
• MANUSCULPT an inscription carved or engraved by hand ...a1859 nonce word
• MEMORANDUM a memorial inscription ...1810 Sc.
• ONWRITING † that which is written on something; an inscription ...c975
• POS(E)Y an inscription engraved inside an old-fashioned wedding ring ...1933 Amer. dial.
• SCRIPTION † a writing; a document; an inscription ...1597
• TITLE † an inscription placed on or over an object, giving its name or describing it; a legend; sometimes, a placard hung up in a theatre giving the names of the piece, etc. ...c950
inscription - person
• LAPICIDE one who cuts stones or inscriptions on stone ...1656
 
INSCRUTABLE - adjectives
• IMPERSCRUTABLE † not to be searched out; unsearchable, inscrutable, unintelligible, incomprehensible ...1526
 
INSECT - nouns
• B a bug ...M19 sl.
• BEEZER-WEEZER an insect that sits in trees or bushes in hot weather and makes a sharp, buzzing sound; probably a cicada ..1970 Amer. dial.
• B FLAT a bug; a bedbug ...1853
• BUG JUICE 1. an insecticide or insect repellent ...1944 Amer. dial.
2. the saliva or squashed remains of insects ...1967 Amer. dial.
• BUGOLOGY the science of bugs or insects ...1843 US humorous
• BUMMER a bumblebee; generally, any insect which makes a buzzing or humming sound ...1822
• CHINCH a bedbug ...20C US sl.
• CHIZZLE BOBS the bugs found under decaying wood or old bricks, etc. ...19C Eng. dial.
• CREEPERS body lice, bedbugs, fleas, etc.; anything that makes your flesh creep when they creep over your flesh ...19C Brit. sl.
• CREEPY-CRAWLY any insect or similar small creeping creature considered as disagreeable or frightening ...1858 sl.
• ENEMY an insect; an ant ...Bk1900 Sc. & Eng. dial.
• FLY † any winged insect; as the bee, gnat, locust, moth, etc. ...c950
• MESEE a midge or 'no-see-em' ...1927 Amer. dial.
• NO-SEE-UM any small, nearly invisible insect that bites ...1842 US sl.
• QUICK an insect ...Bk1905 Eng. dial.
• QUICKLING a young insect ...Bk1905 Eng. dial.
• STRADDLE-BUG a long-legged beetle; any long-legged insect ...1831 Eng. & Amer. dial.
• TANG † the tongue of a serpent, formerly thought to be the stinging organ; the sting of an insect ...a1350 obs. exc. Eng. dial.
• WANT-LOUSE †* a bedbug, a bug ...1655
• WATER BUG a cockroach, esp. a large one, or a similar insect ...1875 Amer. dial.
• WOG any insect, esp. a predatory or disagreeable one ...1938 Aust. sl.
insect - person
• BEETLE JOSEPH an entomologist ...Bk1940 Eng. public school sl.
• BEETLE-STICKER a jocular name for an entomologist ...1873
• BUG-HUNTER an entomologist ...1889 jocular
• BUGOLOGIST an entomologist ...1901 US humorous
• MOCH-MAN a jocular term for an entomologist (moch = moth) ...1961 Sc.
• MOTH-HUNTER † an entomologist who studies moths ...1937
insect - verbs 
• TANG † to sting as a serpent or an insect ...a1400 obs. exc. Eng. dial.
 
​INSECURE - adjectives
• SHOGGY shaky, insecure ...1866
• TICKLE 1. in unstable equilibrium; easily upset or overthrown, insecure, tottering, crazy; delicate, sensitive ...1515
† 2. insecure; precarious, slippery ...1579 obs. or arch.
• TOLTER moving unsteadily; unsteady, unstable, tottering; insecure, precarious ...1423 Sc. & Eng. dial.
• UNCANNIE dangerous, unreliable, insecure, treacherous, threatening ...1748 Sc.
• UNCANNY dangerous, unreliable, insecure, treacherous, threatening ...1748 Sc. & Eng. dial.
• UNSICKER insecure, unsteady, not to be relied on ...1796 Sc.
• WANKLE † unsteady, insecure; changeable, unsettled, precarious; inconstant, wavering; also, weak in health, delicate, sickly ...c888 obs. exc. Eng. dial.
insecure - adverbs
• TICKLELY † in an insecure or unstable manner ...1601
• TICKLY † in an insecure or unstable manner ...1674
insecure - nouns 
• HOUSE OF CARDS any insecure or unsubstantial scheme, system, etc. ...1641
• TAPPIE-TOORIE anything resting on an insecure foundation and swinging at the top ...Bk1905 Sc.
 
​INSECURITY - nouns
• TICKLENESS † insecurity, instability; critical situation, precariousness; inconstancy; uncertainty ...c1390
• UNGRITH † insecurity, hurt ...c1200
 
INSENSIBILITY - nouns
• CALLOSITY a hardened state of mind or conscience; insensibility ...1658
• DEDOLENCE † absence of grief or sorrow; insensibility, callousness, hard-heartedness ...1606
• DEDOLENCY † absence of grief or sorrow; insensibility, callousness, hard-heartedness ...a1617
• DUMPISHNESS † sluggishness, inertness, insensibility ...1574
• OBTUSITY obtuseness; dullness, insensibility, stupidity ...1823 
 
INSENSIBLE - adjectives
• DEAD-HEARTED dead in feeling, callous, insensible ...1642
• DEDOLENT † that feels sorrow no more; feeling no compunction; insensible, callous, hard-hearted ...1633
• DIRR insensible, destitute of feeling ...Bk1900 Sc. & Eng. dial.
• DUMPISH † dull, stupid, slow-witted; inactive, inert, spiritless; destitute of sensation; abstracted, insensible to outward things; dull, uninteresting ...1545
• STONY insensible, unfeeling, as if consisting of stone ...c1230
• UNWITLESS † senseless, insensible ...a1225
insensible - verbs 
• DATELESS insensible, as from a blow ...1854 Eng. dial.
• SILLY to stun; to render silly or insensible ...1850
• UNSENSE to render senseless or insensible; to stun with a blow or fall ...1892 Eng. dial.
 
INSENSITIVE - adjectives
• ARMOUR-PLATED insensitive to attack; callous ...1894
• DEAD FROM THE NECK UP brainless, stupid, insensitive ...1911 sl.
• PACHYDERMATOUS thick-skinned; insensitive to rebuff, ridicule, or abuse; not easily affected by outside influences ...1854
• PACHYDERMOUS * thick-skinned; insensitive to rebuff, ridicule, or abuse; not easily affected by outside influences ...1836
insensitive - nouns
• FOOT-IN-MOUTH DISEASE the habit of making inappropriate, insensitive, or imprudent statements ...Bk2006 US sl.
insensitive - person
• ZHLOB an oaf or dolt; a fool, a moron; a boorish, insensitive person; a coarse person, a slob ...1950 US sl.
• ZHLUB an oaf or dolt; a fool, a moron; a boorish, insensitive person; a dull, unpolished person, usually a male ...1950 US sl. 
 
INSEPARABLE - adjectives
• CLOSE AS STINK ON SHIT very close; intimate; inseparable ...Bk2006 US sl.
• NAVEL-TIED inseparable ...1767 sl.
• THICK AS THIEVES in close association, familiar, intimate, inseparable ...1833 UK sl.
• UNDEPARTABLE † inseparable; indivisible ...c1374
 
INSERT - verbs
• IMMISS † to put in, to insert, to inject, to infuse; to let in, to admit ...1647
• IMMIT † to put in, to insert, to inject, to infuse; to let in, to admit; the opposite of 'emit' ...1578 now rare or obs.
• YARM to thrust into, to insert ...1926 Amer. dial.
 
INSERTION - nouns
• IMMISSION * insertion, injection, admission, introduction; the opposite of 'emission' ...1578
 
INSIDE - adverbs
• BEN inside, within, towards the inner part; in or into an inner part of the house; into the parlour, etc. from the kitchen; in the parlour or chamber ...c1425 Sc. & N. Eng. dial.
• IN-A-DOORS in the house ...Bk1902 Eng. dial.
• UMBRATILE † spent within doors ...1592
inside - verbs 
• KEEP UP † to stay within doors; to put up or stop at ...1704
 
INSIDE OUT - adverbs
• ASS-SIDE-BEFORE backwards, inside out, in reversed position ...1969 Amer. dial.
• ASSY-FUSSY backside foremost; in reverse position, inside out ...1967 Amer. dial.
• BACK-END-BEFORE backwards; in reversed position; inside out ...1965 Amer. dial.
• BACK-END-FOREMOST backwards; in reversed position; inside out ...1965 Amer. dial.
• BACK-END-FRONT backwards; in reversed position; inside out ...1965 Amer. dial.
• BACK-END-TO backwards; in reversed position; inside out ...1926 Amer. dial.
• BACK-FRONT backwards, inside out ...1950 Amer. dial.
• BACKSIDE OUTWARDS backwards; inside out ...1937 Amer. dial.
• BACKSIDE-BEFORE backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKSIDE-FORE backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKSIDE-FOREMOST backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKSIDE-FORWARD(S) backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKSIDE-FRONT backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKSIDE-TO backwards; in reversed position; inside out ...1920s Amer. dial.
• BACKWARDS-BEHIND backwards; inside out ...1967 Amer. dial.
• BACKWARDS-FRONT backwards; inside out ...1967 Amer. dial.
• BACKWARDS-IN backwards; inside out ...1967 Amer. dial.
• BACKWARDS-WAY-BEFORE backwards; inside out ...1967 Amer. dial.
• END FOR ABOUT in inverted or reversed position; inside out ...1957 Amer. dial.
• END FOR END in inverted or reversed position; inside out ...1871 Amer. dial.
 
INSIGHT - nouns
• SIGHT † knowledge, skill, insight ...1530
• VATICINATION † divine or inspired apprehension or knowledge; intuition, insight ...1678
insight - verbs
• SEE THROUGH A BRICK WALL to be unusually discerning; to have extraordinary insight ...Bk1999 

INSIGHTFUL - adjectives
• DUNGEONABLE † having great knowledge; insightful, astute ...1855 Eng. dial.

INSIGNIA - nouns
• PATCH any form of insignia as worn by criminal or youth gangs, as the Hell's Angels, US prison gangs, street gangs, etc. ...1950s sl., orig. US
 
INSIGNIFICANCE - nouns
• MINIMIFICENCE * little doings; insignificance; lack of grandeur; opposed to magnificence ...1759
 
INSIGNIFICANT - adjectives
• ASSY insignificant, second-rate, unimportant ...2000s US Black sl.
• BAUBLING † trifling, contemptible, paltry, insignificant ...1601
• BIG AS A BEE'S KNEE of a very small size; trifling, insignificant ...1838
• CHICKEN-PLUCKING second-rate, vulgar, insignificant ...1960s US sl.
• CHICKENSHIT petty, insignificant ...1940s sl., orig. US
• CHOOTAH small, insignificant ...Bk1892 Anglo-Indian sl.
• CROW poor; mean; trivial; insignificant; worthless ...Bk1914 criminals' sl.
• CROW-BAIT insignificant; trivial; worthless ...Bk1942 Amer. sl.
• DASHY-TRASHY insignificant; trivial; worthless ...Bk1942 Amer. sl.
• DINKY trifling, insignificant, unimpressive ...L19 N. Amer. colloq.
• DRIBBLE insignificant; trivial; worthless ...Bk1942 Amer. sl.
• EASY † of small importance, insignificant, slight; not very good, indifferent ...1468
• FIDDLE-FADDLE insignificant; trivial; worthless ...Bk1942 Amer. sl.
• FIDFAD insignificant; trivial; worthless ...Bk1942 Amer. sl.
• FOOTLE worthless, paltry, trifling, insignificant ...1894
• FOOTY insignificant, worthless, despicable, futile ...18C sl.
• FRIGGING insignificant, petty, worthless ...L18 sl.
• HALF-ASS careless, ineffectual, inadequate, incompetent, second-rate; mediocre, insignificant, unsatisfactory ...M19 sl.
• HALF-ASSED careless, inadequate, incompetent, second-rate, mediocre, insignificant ...1865 US sl.
• HAMMERED-DOWN stunted; short; wretched; worthless; insignificant ...1919 Amer. dial.
• JUNKY insignificant; trivial; worthless ...Bk1942 Amer. sl.
• HALF-ASS careless, inadequate, incompetent, unsatisfactory, mediocre, insignificant ...1956 Amer. sl.
• HALF-ASSED careless, inadequate, incompetent, unsatisfactory, mediocre, insignificant ...1932 Amer. sl.
• IMPORTLESS †* without import or significance; trivial, unimportant; meaningless ...1606
• JERKWATER small, insignificant, hick ...colloq.
• KIDLING petty, insignificant ...B1900 Eng. dial.
• LIKE A CHIP IN A MESS OF MILK of persons: insignificant, useless ...Bk1905 Eng. dial.
• MEASLY insignificant; trivial; worthless ...Bk1942 Amer. sl.
• MOULDY insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NAFFLING of a child: contemptible; insignificant ...Bk1883 Eng. dial.
• NAUGHTY valueless, good-for-nothing, insignificant, trifling; small and contemptible in appearance ...1835 Sc. & Eng. dial.
• NICKEL-DIME small-time, petty, insignificant ...1960s US sl.
• NIDGING trifling, insignificant ...B1900
• NIFLING † of small importance or value; trifling; insignificant; worthless ...1649 rare or obs.
• NO-ACCOUNT worthless; useless; good-for-nothing; insignificant; undependable, untrustworthy, criminal ...1845 Amer. dial.
• NO-COUNT worthless, lazy, shiftless; useless, good-for-nothing; insignificant, trivial ...1853 Amer. dial.
• NO-GOOD insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NO GREAT CATCH insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NO GREAT SCRATCH insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NO GREAT SHAKES insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NO ODDS insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT FIT TO KILL insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOTHING IN IT insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOTHING TO IT insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH A CONTINENTAL insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH A DAMN insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH A DIME A DOZEN insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH A FART IN A HAILSTORM unimportant, insignificant; of little value ...1965 Amer. dial.
• NOT WORTH A FART IN HELL unimportant, insignificant; of little value ...1965 Amer. dial.
• NOT WORTH A HOOT insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH SHUCKS insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH THE POWDER AND SHOT insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH THE POWDER TO BLOW IT UP insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOT WORTH TWO HOOTS IN HELL insignificant; trivial; worthless ...Bk1942 Amer. sl.
• NOWHERE said of something insignificant or dreary ...1940 sl.
• ONE-HORSE small and insignificant; unimportant; second-rate, inferior ...1853 Amer. dial.
• ONE-PUB insignificant, petty ...M19 sl., orig. US
• ORNERY inferior, poor, insignificant, worthless, contemptible, mean, immoral ...1816 Amer. dial.
• PEERIE UDDIE small, insignificant ...1908 Sc. 
• PENNY ANTE insignificant, unimportant ...M19 sl., orig. US
• PIDDLING trifling, trivial, insignificant; loafing ...1899 Amer. dial.
• PILULOUS like a pill in size; small, insignificant, minute, trifling ...1872
• PISS-ANT insignificant, worthless, petty; contemptible ...1952 sl.
• PISSY-ANT petty, insignificant, unimportant ...1971 Amer. dial.
• POKEY insignificant; paltry ...1849 Amer. sl.
• POKY insignificant; paltry ...1849 Amer. sl.
• PUISNE † small, insignificant, petty ...E17
• PUSILL † small, insignificant, petty ...1623
• SCOY thin, poor; small, insignificant ...1846 Eng. dial.
• SCRATTY small, insignificant, thin, puny ...Bk1904 Eng. dial.
• SCRINCHING small, puny, insignificant ...Bk1904 Eng. dial.
• SHAG insignificant; trivial; worthless ...Bk1942 Amer. sl.
• SHIRTTAIL small; insignificant ...1929 Amer. dial.
• SILLY † insignificant, trifling ...1567
• SINGLE-SOLED † of persons: poor, mean, of little account or worth; insignificant ...1588
• SMALL-BEER insignificant; trivial; worthless ...Bk1942 Amer. sl.
• SMALL-CHANGE insignificant; trivial; worthless ...Bk1942 Amer. sl.
• SMALL-POTATO insignificant; trivial; worthless ...Bk1942 Amer. sl.
• SMALL-TIME insignificant, unimportant; minor ...1938  US sl.
• SMALL-TOWN insignificant; trivial; worthless ...Bk1942 Amer. sl.
• SNIPPER-SNAPPER small, insignificant ...B1900 Eng. dial.
• TANK TOWN insignificant, petty ...1930s US sl.
• TEN-TWENTY-THIRTY insignificant; trivial; worthless ...Bk1942 Amer. sl.
• THREE-CENTS insignificant, unimportant, worthless ...20C W. Indies sl.
• TIDDLYWINKY tiny, insignificant ...1901 Eng. dial.
• TINHORN cheap and insignificant; small-time...1880 sl.
• TIN-POT insignificant; trivial; worthless ...1765
• TOOTY small, insignificant ...1857 Amer. dial.
• TRIFLOUS †* trifling; insignificant, trivial; frivolous ...1509
• TWO-BIT of little value or significance; petty, small-time ...1870 Amer. dial.
• TWO-BY-FOUR of little value or significance; petty, small-time; small ...1887 Amer. dial.
• UDDIE small, insignificant ...1908 Sc.
• UDDY small, insignificant ...1908 Sc.
• UIRRY small, trifling, insignificant ...1929 Sc.
• UNSIGNIFIED insignificant ...Bk1905 N. Ireland
• VIDIMENT insignificant ...Bk1905 Sc.
• WAFF feeble, insignificant, paltry; weak, worn-out ...1796 Sc.
insignificant - nouns
• ABBREVIATED PIECE OF NOTHING an insignificant thing ...Bk2000 Amer. sl.
• BABBY-WARK insignificant doings; sometimes used in contempt for things bearing fine names ...Bk1898 Eng. dial.
• BETWIXT AND BETWEEN a temporary insignificant task between more important jobs ...1968 Amer. dial.
• BIT OF FLUFF anything or any person considered insignificant or ineffectual ...1980s sl.
• BLIP a surprise; a sudden disappointment; anything quick and insignificant; a one-time thing of little importance ...1940s US Black sl.
• BUG DUST something insignificant or of little value ...1958 Amer. dial.
• DOODLEY-SHIT anything worthless or insignificant; rubbish ...1950s sl., orig. US
• DOODLY-SHIT anything worthless or insignificant; rubbish ...1950s sl., orig. US
• FARTEEN anything totally insignificant ...1960s Irish sl.
• FART IN A HAILSTORM the most insignificant, unimportant, or transitory thing ...1965 Amer. dial.
• FART IN A THUNDERSTORM, A something of negligible worth or impact; something insignificant, ineffective, or fleeting ...1989 UK sl.
• FART IN A WHIRLWIND the most insignificant, unimportant, or transitory thing ...1952 Amer. dial.
• FART IN A WINDSTORM the most insignificant, unimportant, or transitory thing ...1963 Amer. dial.
• FIDDLY-FUCK anything considered utterly insignificant ...1960s US sl.
• LITTLE END OF NOTHING something very small, unimportant, or insignificant ...1825 Amer. dial.
• LITTLE END OF NOTHING SHARPENED DOWN TO A POINT anything very insignificant or utterly unimportant ...E19 US sl.
• LITTLE END OF NOTHING WHITTLED DOWN TO A POINT anything very insignificant or utterly unimportant ...E19 US sl.
• MAKE-WEIGHT a of insignificant value thrown in to make up a deficiency or fill a gap ...1776
• MESS a term of contempt for anything small, weak, or insignificant ...Bk1905 Eng. dial.
• NIPPIE a little insignificant thing ...1964 Sc. 
• NIPPOCK a little insignificant thing ...1923 Sc. 
• NIPPOCKIE a little insignificant thing ...1964 Sc. 
• PEANUT something insignificant ...1914 Amer. sl.
• PEA-TAD something small and insignificant ...1968 Amer. dial.
• PICAYUNE the name formerly given in Louisiana, Florida, etc., to the Spanish half-real, value 6 1/4 cents or 3 pence;  then given to the U.S. 5-cent piece or other coin of small value; hence, a person or thing considered small,  mean, or insignificant; something of slight value or trifling importance ...1804 Amer. colloq.
• PIG'S WHISTLE a thing of little value or significance ...1935 US
• PINCH OF BUG DUST something insignificant or of little value ...1958 Amer. dial.
• POOT the most insignificant or transitory thing ...1958 Amer. dial.
• SCADYIN anything very small and insignificant ...1884 Ireland
• SCRAT anything very small and insignificant; a tiny child; a meagre, mean-looking person; the smallest coin ...1885 Sc. & Eng. dial.
• SNICKET a very small piece of anything; anything small and insignificant ...1887 Eng. dial.
• TITMOUSE a small, petty, or insignificant person or thing ...1596
• TURKEY RUN a remote or insignificant place ...1906 Amer. dial.
• TURKEY TOWN a remote or insignificant place ...1966 Amer. dial.
• TURKEY TROT a remote or insignificant place ...1905 Amer. dial.
• VIDIMENT something insignificant; the smallest particle ...1842 Sc.
• WAFFLER anything small or insignificant ...1899 Eng. dial.
insignificant - person
• ABBREVIATED PIECE OF NOTHING an insignificant person or thing ...Bk2000 Amer. sl.
• ABLACH, ABLACK, ABLICH an insignificant, worthless person; an incapable person ...1790 Sc.
• ANDY the person in a band who is so insignificant that no one gives a care about him ...20C teen & high school sl.
• ARKIE, ARKY (derogatory) a rustic person or one considered insignificant ...1942 Amer. dial.
• ARSEWORM, ARSWORM a little diminutive man; a small or insignificant fellow; an oaf ...1690 sl. Venery Sl 1916
• ATTERCOB a spider; hence, a small, insignificant person ...1742 Eng. dial.
• ATTERCOP a small, insignificant person ...1742 Sc. & Eng. dial.
• AZZALD a silly, insignificant, mean person ...1830 Eng. dial.
• AZZARD a silly, insignificant, mean person ...1790 Eng. dial.
• BAA-WAA-BODY a silly or insignificant person ...1892 Eng. dial.
• BAGGIT an insignificant little person ...1879 Sc.
• BAUCHLE an old, decrepit, or shabby person; later, an insignificant, unimportant or worthless person; a ne'er-do-well ...1820 Sc.
• BEDBUG an unpleasant or insignificant person ...1928 sl., orig. US Black 
• BEGGAR-TRASH someone thought to be low-class, worthless, or insignificant ...1939 Amer. dial.
• BILCH a little, crooked, insignificant person ...1825 Sc.
• BIMBO an insignificant, unimportant person ...c1840 Amer. sl.
• BIRD TURD an insignificant, worthless person. an obnoxious person ...1959 US sl.
• BIT OF FLUFF anything or any person considered insignificant or ineffectual ...Bk1984 sl.
• BLAH a small or insignificant person ...1967 US sl.
• BLOB a useless or insignificant person ...20C sl., chiefly Aust.
• BUG-EATER (derogatory) an insignificant or worthless person ...1840 Amer. dial.
• BUG-FUCKER (derogatory) an insignificant and worthless male ...Bk2006 US sl.
• CEDAR CHOPPER a rustic, a countrified person; an insignificant person ...1962 Amer. dial.
• CHEESE an insignificant person, esp. an unworthy person in a position of authority ...20C Amer. sl.
• CHEWEEKA an insignificant, puny person ...1950 Amer. dial.
• CRUMB an untrustworthy, loathsome, or objectionable person; an insignificant, despicable person ...c1920 Amer. sl.
• DAB an insignificant person ...Bk1900 Eng. dial.
• DANDIPRAT, DANDYPRAT † a small, insignificant, or contemptible fellow ...1556 obs. or arch.
• DANDY-SPRAT a person of small or insignificant stature; a dwarf ...1888 Eng. dial.
• DIRT an insignificant or low-class person ...1968 Amer. dial.
• EDDERCROP a spider; hence, a small, insignificant person ...1742 Eng. dial.
• EDDICROP a spider; hence, a small, insignificant person ...1742 Eng. dial.
• ERK a term of contempt; an insignificant person ...1940s sl.
• ETTERCAP a spider; hence, a small, insignificant person ...1742 Sc.
• ETTERCROP a spider; hence, a small, insignificant person ...1742 Eng. dial.
• FARTHING-FACED CHIT a small, pinch-faced, insignificant person ...1900s sl.
• FLURT an insignificant person; a fool ...19C Eng. dial.
• FOPDOODLE † a silly, vain, empty person; a stupid or insignificant fellow; a fop, fool, simpleton ...E17
• GEEKOID a socially insignificant or unattractive person; a nerd, a geek ...Bk1993 sl.
• GERBIL a stupid, insignificant, or unpleasant person; a foolish or obnoxious person ...1986 US sl.
• GERM an insignificant, despicable, or contemptible person ...1942 US sl.
• GINK a dull, ineffectual, or insignificant person; a jerk ...1906 sl.
• GULLY DIRT very insignificant or low-grade people ...1966 Amer. dial.
• GUZZLER an insignificant person ...1920s US sl.
• HALF-PINT a short, small or insignificant person; an ineffectual person, esp. a light-built male; a child ...1876 US sl.
• HALF-PORTION a small. diminutive, or insignificant person; an undersized person; a child ...1914
• HAM SHANK a third-rate, insignificant person ...2004 UK sl.
• HATTER-CROPPER a spider; hence, a small, insignificant person ...1742 Eng. dial.
• HAWNYOCK an inexperienced or ignorant person; a hick; a low-class or insignificant person ...1943 Amer. dial.
• JACK-A-DANDY an insignificant little fellow; a little pert or conceited fellow ...1632
• JACK-A-LENT an insignificant or contemptible person; a simpleton; a dwarf; a puppet ...1598 arch.
• JACK-DANDY a little fop; a coxcomb or a petty dandy; an insignificant or impertinent little fellow ...1632 colloq. 
• JACK OF DANDY an insignificant person; a fop ...E17 sl.
• KENTUCK (often derogatory) an insignificant or low-grade person ...1968 Amer. dial.
• LINTHEAD (derogatory) a cotton-mill worker; hence, a low-class White person; a hillbilly; an insignificant person ...1933 Amer. dial.
• LITTLE SHOT an insignificant person ...1930s US sl.
• MAKE-WEIGHT a person insignificant value thrown in to make up a deficiency or fill a gap ...1776
• MANISHON a little insignificant-looking person ...Bk1905 Eng. dial.
• MESSAN a term of contempt for a small, insignificant person ...1721 Sc.
• MIDGE a small, insignificant person ...1757 Sc.
• MINIMUS a creature of the smallest size; a dwarf; a small or insignificant person ...1590
• MOTH a person who is insignificant or fragile, or who hovers around temptation and is liable to be drawn to destruction, as a moth to a flame ...1600
• MOTHBALL * an insignificant or foolish person; an obnoxious or aggravating person; a teenage jerk; an irritating person; an over-diligent student ...1944 US sl.
• MOUSE a weakling; a small or insignificant person ...1940 sl.
• NACHET an insignificant person ...Bk1845 Sc.
• NACKET, NACKIT a pert, forward, smart boy; a trifling little person; an insignificant person; a wicked, mischievous, or impertinent child; a precocious child ...1770 Sc.
• NAZZARD † an insignificant or feeble person; a worthless scamp; a silly, foolish fellow ...1619 obs. exc. Eng. dial.
• NEKARD †* an insignificant person ...a1400
• NEKER †* an insignificant person ...a1400
• NERD, NURD an unpleasant, insignificant, or dull person ...1950s sl., orig. US
• NIFFIE a small, insignificant person ...1893 Sc. 
• NIFFNAFF a small, insignificant person ...1808 Sc. 
• NURD an unpleasant, insignificant, or dull person ...1950s sl., orig. US
• ONE-EYED SCRIBE a monumental liar; an insignificant person ...1970s US Black sl.
• OUTLAW one who is crude or ill-mannered; a misfit; a child who misbehaves; an insignificant person; an immoral woman ...1965 Amer. dial.
• PAATERMENT † a useless brat; an insignificant person ...1939 Sc.
• PEANUT a small or insignificant person; also, a term of endearment for a small child ...1915 Amer. dial.
• PICAYUNE a person or thing considered small,  mean, or insignificant ...1804 Amer. colloq.
• PICKSNIFF an insignificant, paltry, contemptible person ...1862 Eng. dial.
• PISS-ANT (depreciative) an insignificant, contemptible, or irritating person ...1935 sl.
• POCHUCKER an insignificant person; a low-grade person ...1968 Amer. dial.
• POP-SQUIRT a pert, conceited man of small physique; an insignificant, pretentious fellow ...1905 Amer. dial.
• PUNK a bumptious but insignificant or contemptible person ...19C sl.
• RAKINGS AND SCRAPINGS OF THE EARTH very insignificant or low-grade people ...1966 Amer. dial.
• SARDINE an insignificant or contemptible person; a petty character ...Bk1912 Amer. dial.
• SCHLAPPER an insignificant person; a second-rater ...1940s sl., orig. US
• SCHLEPPER, SCLEPPER 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
• SCOPPERIL an insignificant person ...1854 Eng. dial.
• SCRAPINGS very insignificant or low-grade people ...1966 Amer. dial.
• SCRAPINGS OF THE EARTH very insignificant or low-grade people ...1966 Amer. dial.
• SCRAPPINGS OF THE EARTH very insignificant or low-grade people ...1966 Amer. dial.
• SCRISUM a fogey; a fright; an insignificant-looking person ...1890 Eng. dial.
• SCRUFF a contemptible person; an insignificant person ...1968 Amer. dial.
• SHORT-ARSE, SHORT-ASS a person of small stature; a person of little account ...1706 sl.
• SNIFTY † an insignificant person ...1660 Sc.
• SNIP an insignificant person ...Bk1913-17 Amer. dial.
• SNIPPER-SNAPPER † a small, insignificant, conceited fellow; an impertinent youth; an effeminate young fellow ...c1590 obs. exc. Eng. dial.
• SNIRP an insignificant person ...19C Brit. sl.
• SQUALL † a small or insignificant person; usually used as a term of abuse ...1570 
• SQUIRT someone insignificant but presumptuous ...1848 sl., orig. US
• TADPOLE an insignificant person ...1915 Amer. dial.
• TARHEEL a poor White, esp. from the piney woods of North Carolina; a rustic or countrified person; any north Carolinian; an insignificant person ...1846 Amer. dial.
• THING-O-WOLD a paltry, insignificant person ...Bk1905 Eng. dial.
• TITMOUSE a small, petty, or insignificant person or thing ...1596
• TOM THUMB a dwarf or pygmy of popular tradition or fable; hence, a dwarf or diminutive male person; also contemptuously, a petty or insignificant person ...1579
• URF, URPH a stunted, ill-grown, and ill-conditioned person; a dirty, insignificant person, esp. applied to children; a dwarfish person ...1838 Sc. & Eng. dial.
• URIAH HEEP an objectionable or unpleasant person; a dull or insignificant person ...1992 UK rhyming sl. for 'creep'
• USED-TO-BE a has-been ...1853 Amer. colloq. 
• VISION an insignificant, characterless person ...1825 Sc.
• WALKING DICK WITH EYES an insignificant male; a loser ...1980s US college sl.
• WARCHER a contemptuous term for a small, insignificant person ...Bk1887 Eng. dial.
• WARF a stunted, ill-grown, and ill-conditioned person; a puny, contemptible person; a dirty, insignificant person, esp. applied to children; a dwarfish person ...1818 Sc.
• WARM BODY an insignificant person, someone who is present but does not participate ...2003 US sl. 
• WHIFFET a small or contemptible person; an insignificant looking person; a lazy boy ...1767 Amer. dial.
• WHIFFMAGIG a trifler; an insignificant, contemptible person; a mean, paltry person ...1871
• WURF a dirty, insignificant person, esp. applied to children; a dwarfish person ...1838 Sc. 
• WUZZER a has-been ...Bk1913-17 Amer. dial.
• YAFF a puny, peevish, insignificant person ...1887 Sc.
• YIFF a small, puny, insignificant person given to idle chatter ...1956 Sc.
• YIFF-YAFF a small, puny, insignificant person given to idle chatter ...Bk1825 Sc.
• ZERO a person of no importance or consequence; a useless, worthless, or insignificant person; a nobody, a nonentity ...1650
• ZILCH an ordinary or completely dull, ineffectual, unattractive, or insignificant person; a person without much social or academic ability; a person of little consequence; a nobody; a socially inept outcast ...1967 US sl.
• ZIP a worthless person; a person who amounts to zero; an insignificant person; an unpleasant person with no good qualities; a fool; a sucker ...1971 US sl.
• ZIPPO an insignificant person; an unpleasant person with no good qualities; a fool; a sucker ...1987 US sl.
• ZIP SACK - an insignificant person; an unpleasant person with no good qualities; a fool; a sucker ...1982 US sl.
insignificant - verbs 
• LITTLE to make small or insignificant; to make narrow ...1931 Amer. dial.
insignificant - phrases
• DON'T AMOUNT TO A HANNAH COOK signifies unimportance or insignificance ...1907 Amer. dial.
• NOT AMOUNT TO A HOLE IN THE SNOW said of an unimportant, worthless, or insignificant person ...1975 Amer. dial.
• NOT AMOUNT TO A PISS-HOLE IN THE SNOW said of an unimportant, worthless, or insignificant person ...1967 Amer. dial.
• NOT AMOUNT TO PISS IN THE SNOW said of an unimportant, worthless, or insignificant person ...1967 Amer. dial.