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Noun: stoolpigeon
Usage: informal
  1. Someone acting as an informer or decoy for the police
    - fink [N. Amer, informal], snitch [informal], snitcher [informal], stool pigeon [informal], stoolie [N. Amer, informal], sneak [informal], canary [N. Amer], grass [Brit, informal], snout [Brit, informal]
Noun: stool pigeon  stool pi-jun
Usage: informal
  1. A dummy pigeon used to decoy others

Derived forms: stool pigeons

Type of: bait, betrayer, blabber [informal], decoy, informer, lure, rat [informal], squealer

Encyclopedia: Stool pigeon