stool pigeon
柯林斯词典
1. N a living or dummy pigeon used to decoy others 誘捕用的鴿子
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stool pigeon
剑桥词典
- a person , often a criminal , who gives information in secret to the police so that they can catch other criminals
（秘密曏警方提供情報的）線人，坐探（通常爲罪犯） 返回 stool pigeon