stoolpigeon

Từ điển WordNet v3.1 - WordNet Dictionary

noun

someone acting as an informer or decoy for the police
• Syn:
fink, snitch, snitcher, stool pigeon, stoolie,
sneak, sneaker, canary
• Derivationally related forms:
snitch (for: snitcher), snitch (for: snitch), fink (for: fink)
• Hypernyms:
informer, betrayer, rat, squealer, blabber