He was a humane man, and in spite of his belief in the stool-pigeon system, he introduced good things into Sing Sing.
He'd tell them why some day and they'd know that Tim Murphy wasn't no "stool-pigeon."
Do you take me fer a stool-pigeon, to go into such a deal with my eyes blinded?
If there were no thieves, where would the stool-pigeon and detective find their profits?
A stool-pigeon consorts with criminals, that he may overhear their plans, and betray them to the police.
Among them Annouchka had the ignoble nickname, "stool-pigeon."
Now, the stool-pigeon in this trick is a swell English crook.
Burke's account of the plot in which the stool-pigeon had been the agent offered too many complications.
If some stool-pigeon tips him off to the police, and he is sent to stir, he invariably suspects the wrong person.
You are right; they fooled us on a stool-pigeon; this whole thing was a put-up job.
"police informer," 1868, American English; earlier "one who betrays the unwary (or is used to betray them)," 1821, originally a decoy bird (1812); said to be from decoys being fastened to stools to lure other pigeons. But perhaps related to stall "decoy bird" (c.1500), especially "a pigeon used to entice a hawk into the net" (see stall (n.2)). Also cf. pigeon.
An informer, especially for the police: “Lefty figured out that Mugsy was the stool pigeon when he saw him talking to the warden.”
Violent and pugilistic; rough and sense of an apprentice, especially one unskilled at or vicious: I never even touched the slut and now there's learning a theatrical turn of some sort while serving gonna be some sort of stompass scene (1970s+) as the underling of a master]