stool pigeon

/stul ˌpɪdʒən/

/stul ˈpɪdʒən/

Other forms: stool pigeons

Definitions of stool pigeon

1. noun

   someone acting as an informer or decoy for the police
   synonyms: canary, fink, sneak, sneaker, snitch, snitcher, stoolie, stoolpigeon

   type of:

   betrayer, blabber, informer, rat, squealer

   one who reveals confidential information in return for money
2. noun

   a dummy pigeon used to decoy others
   type of:

   bait, decoy, lure

   something used to lure fish or other animals into danger so they can be trapped or killed