[n] someone acting as an informer or decoy for the police
[v] give away information about somebody; "He told on his classmate who had cheated on the exam"
[v] take by theft; "Someone snitched my wallet!"
Synonyms
betray, canary, cop, denounce, fink, give away, glom, grass, hook, knock off, peach, rat, shit, shop, sneak, sneaker, snitcher, stag, stoolie, stoolpigeon, tell on, thieve