Snitch

Verb

 * 1)  To steal, quickly and quietly.
 * 2)  To inform on.
 * 3)  To contact or cooperate with the police for any reason.

Noun

 * 1) A thief.
 * 2) An informer, usually one who betrays his group.

Synonyms

 * grass, mole, rat, stool pigeon

Thesaurus
abstract, and, annex, appropriate, bag, beak, bear witness against, beezer, betray, betrayer, blab, blabber, blabberer, blabbermouth, blow the whistle, boost, borrow, canary, conk, cop, crib, defraud, delator, embezzle, extort, filch, fink, hook, inform against, inform on, informer, lift, make off with, narc, nark, nick, nip, palm, peach, peacher, pecker, pilfer, pimp, pinch, poach, purloin, rat, run away with, rustle, schnozzle, scrounge, sell out, shoplift, sing, smeller, snare, snatch, snitch on, snitcher, snout, spy, squeak, squeal, squealer, steal, stool, stool pigeon, stoolie, swindle, swipe, take, talebearer, tattle, tattler, tattletale, tell on, telltale, testify against, thieve, tipster, turn informer, walk off with, whistle-blower