7. (adj.)sneak stealthy; surreptitious: a sneak raid.
Etymology: (1590–1600; obscurely akin to ME sniken, OE snīcan to creep, c. ON snīkja to hanker after)
Definition of 'sneak'
Princeton's WordNet
1. (noun)sneak a person who is regarded as underhanded and furtive and contemptible
2. (noun)prowler, sneak, stalker someone who prowls or sneaks about; usually with unlawful intentions
3. (adj)fink, snitch, snitcher, stoolpigeon, stool pigeon, stoolie, sneak, sneaker, canary someoneacting as an informer or decoy for the police
4. (verb)furtive, sneak(a), sneaky, stealthy, surreptitious marked by quiet and caution and secrecy; takingpains to avoid being observed "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"
5. (verb)sneak, mouse, creep, pussyfoot to go stealthily or furtively "..stead of sneaking around spying on the neighbor's house"
6. (verb)sneak put, bring, or take in a secretive or furtive manner "sneak a look"; "sneak a cigarette"
7. (verb)pilfer, cabbage, purloin, pinch, abstract, snarf, swipe, hook, sneak, filch, nobble, lift make off with belongings of others
8. (verb)slip, sneak pass on stealthily "He slipped me the key when nobody was looking"
2. (noun)sneak a ball bowled so as to roll along the ground; -- called also grub
3. sneak to act in a stealthy and cowardly manner; to behave with meanness and servility; to crouch
4. (verb)sneak to creep or steal (away or about) privately; to come or go meanly, as a person afraid or ashamed to be seen; as, to sneak away from company
5. (verb)sneak to hide, esp. in a mean or cowardly manner