any small carnivore of the genus Mustela, of the family Mustelidae, having a long, slender body and feeding chiefly on small rodents.

any of various similar animals of the family Mustelidae.

a cunning, sneaky person.

a tracked vehicle resembling a tractor, used in snow.

Slang . an informer; stool pigeon.

to evade an obligation, duty, or the like; renege (often fol. by out )

That's one invitation I'd like to weasel out of.

to use weasel words; be ambiguous; mislead

Upon cross-examination the witness began to weasel.

Slang . to inform.

noun

betrayer , blabbermouth * , canary * , deceiver , deep throat , double-crosser , fink * , informant , informer , narc , nark , rat * , sneak , snitch , snitcher , source , squealer * , stoolie , stool pigeon * , tattler , tattletale , tipster * , turncoat , whistle-blower , prowler , sneaker

verb

balk , beat around the bush , circumvent , cop out , dance around an issue , dodge , duck , elude , equivocate , eschew , flee , get around , give the runaround , hedge , hem and haw * , lay low * , pussyfoot , put off , renege , shirk , shuck , sidestep , slip out , sneak away , tap dance * , waffle * , welsh , worm one’s way out of , euphemize , shuffle , tergiversate