Stool pigeon
01
诱饵鸽, 假鸽子
a dummy pigeon used to decoy others
02
线人, 间谍
a person sent into a group as a spy to report on its activities
Idiom
Informal
Old use
例子
The disgruntled employee acted as a " stool pigeon " and reported his coworkers' unauthorized activities to the management.
不满的员工充当了告密者，并向管理层报告了同事的未经授权的活动。
