to go in a stealthy or furtive manner; slink; skulk.

to act in a furtive or underhand way.

British Informal . to tattle; inform.

to move, put, pass, etc., in a stealthy or furtive manner

He sneaked the gun into his pocket.

to do, take, or enjoy hurriedly or surreptitiously

to sneak a cigarette.

a sneaking, underhand, or contemptible person.

Informal . a stealthy or furtive departure.

British Informal . tattletale; informer.

sneaker ( def. 1 ) .

Informal . a sneak preview.

Cards . the lead of a singleton in a suit other than the trump suit, as in whist.

noun

cheater , con artist , coward , cur , dastard , heel * , informer , louse , rascal , reptile , scoundrel , skunk * , slink * , snake * , snake in grass , toad * , weasel * , wretch , prowler , sneaker , weasel

verb

ambush , case , cheat , cower , crawl , creep , deceive , delude , evade , glide , gumshoe * , hide , lurk , mooch , move secretly , ooze , pad , pass , prowl , pussyfoot * , secrete , shirk , sidle , skulk , slide , slink , slip , slither , sly , smuggle , snake , snook , spirit , steal , worm , mouse , pussyfoot , cheater , coward , knave , rascal , scoundrel , secret , skunk , snoop , tiptoe , underhand