made by art; not natural or pathologic. 1  artificial respiration any method of forcing air into the lungs in a person who still has a pulse but whose breathing has stopped. Artificial respiration can be given with no equipment, so that it is an ideal emergency first aid procedure. 2  Indications.
stool pigeon - someone acting as an informer or decoy for the police. canary, fink, snitch, stoolie, stoolpigeon, sneaker, snitcher, sneak. betrayer, blabber, informer, squealer, rat - one who reveals confidential information in return for money.
The word stool is old Sussex dialect for a tree stump, and stool ball is a sport similar to cricket played by the Dutch. Despite many prior suggested references, the first definite reference to the game is found in a 1597 court case concerning dispute over a school's ownership of a plot of land.