a secret conversation, often with evil intent, or supposed evil intent; a low, muttered conversation ...Bk1866 Sc.
to speak in a secret, muttering voice ...Bk1866 Sc.
of unknown origin
FIRST DOCUMENTED USE
1866 - CUDDLE-MUDDLE, n. a secret confabulation; often with evil intent, or supposed evil intent; as, "The twa canna be aboot gueede: they're haudin' sic a cuddle-muddle thegeethir...
From: The Dialect of Banffshire: With a Glossary of Words Not in Jamieson's Scottish Dictionary
- Walter Gregor