stool pigeon

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stool pigeon

1. a living or dummy pigeon used to decoy others
2. an informer for the police; nark
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
the dead fish left in the stoolie's postbox, the slot in the door
Who in that office was the stoolie? Money had been passed to someone from Canada.
In the first chapter, McGill worries about where next months bill money is coming from; in the third, he negotiates late payment with his office building's rental agent; in the fifth, he bribes a stoolie with $20 to rat out an old friend; by the tenth, he's considering taking a job from a hit man.
Hewitt-Smythe explains why: "If the Mafia can't pay the bookie, and the bookie can't pay the stoolie, then the stoolie can't pay the henchman, the henchman can't pay the wise guy, and the wise guy can't pay the Shooter from Detroit so he can make another bad bet with the bookie.
Then one day Tony was escorting his daughter, Meadow (Jamie-Lynn Sigler), on a New England college tour when he spotted a stoolie who had squealed on him to the cops.