stoolie

stool pigeon

An informant, especially a criminal working as a spy for law enforcement officers. Although the criminal agreed to help the police in order to avoid prison time, he was afraid the other gang members would kill him if they discovered he was a stool pigeon.
See also: pigeon, stool

stoolie

An informant, especially a criminal working as a spy for law enforcement officers. A shortening of "stool pigeon," meaning the same. Although the criminal agreed to help the police in order to avoid prison time, he was afraid the other gang members would kill him if they discovered he was a stoolie.
Farlex Dictionary of Idioms.

stool pigeon

A decoy or informer, especially a police spy. For example, Watch out for Doug; I'm sure he's a stool pigeon for the supervisor. This term alludes to a bird tied to a stool or similar perch in order to attract other birds, which will then be shot. However, one writer believes that stool is a variant for stale or stall, both nouns used for a decoy bird before 1500 or so. [c. 1820]
See also: pigeon, stool
The American Heritage® Dictionary of Idioms by Christine Ammer.

stool (pigeon)

and stoolie (ˈstul ˈpɪdʒən and ˈstuli)
n. an informer. (Originally underworld.) Some stool pigeon spilled the works to the boys in blue. I’m no stoolie!
See also: pigeon, stool

stoolie

verb
See stool pigeon
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • a stool pigeon
  • stool pigeon
  • set a thief to catch a thief
  • throw the book at
  • throw the book at (one)
  • throw the book at somebody
  • throw the book at someone
  • make (one's) bones
  • foul play
  • bust out
References in periodicals archive
First twist is that Lau is transferred to Internal Affairs to investigate the triad mole within the force, rapidly mirrored by Chan promising Hon that he'll find out who the police stoolie is.
Teamsters president Jackie Presser, perhaps taking his cue from Ronald Reagan's stoolie days in Hollywood, signed on in the early 1970s as an F.B.I.
It makes it much easier to direct what should be taught, to the point of transforming children into environmental stoolies in the name of "saving the world."
Luckily, or not, he then forgot, or wiser minds prevailed, I don't know, and his ashes were packaged up for the obligatory memorial service--probably more than one--so the mayor and his council, all the lackeys, flunkies, toadies and stoolies caught up in a shit-spotted cascade down those marble steps and into the astonished street is an event that exists first in my imagination and now in yours.
That's why we always referred to the patrols as "stoolies"--even while serving as one.
Gossip from one of these Net stoolies revealed that Pryce was a 16-year-old hacker from Britain who ran a home-based bulletin board system; its telephone number was given to the Air Force.
In 1994, the Drug Enforcement Agency shelled out $14 million to its stoolies; in fact, in 1993 done, U.S.
before being drugged by collared stoolies in layered Indonesian target gear.