stoolpigeon

Definitions of stoolpigeon
  1. noun
    someone acting as an informer or decoy for the police
    synonyms: canary, fink, sneak, sneaker, snitch, snitcher, stool pigeon, stoolie
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    type of:
    betrayer, blabber, informer, rat, squealer
    one who reveals confidential information in return for money
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