noun Etymology: probably from the early practice of fastening the decoy bird to a stool Date: 1826 a person acting as a decoy or informer, a pigeon used as a decoy to draw others within a net
STOOL PIGEON
Meaning of STOOL PIGEON in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012