stool pigeon

Found in Anh - Anh (Wordnet)

Definition Noun : A decoy : A dummy pigeon or other bird used to lure other birds into a trap or within shooting range. An informer : Someone, especially a criminal, who acts as an informer or decoy for the police, betraying associates. Usage The term "stool pigeon" is used to describe a person who provides information to authorities, often secretly. It carries a strong negative connotation of...