stool-pigeon

详细解释:【法】 媒鸽, 用以引诱他人入圈套的人, 密探

英语解释：

名词 stool-pigeon:

someone acting as an informer or decoy for the police同义词：fink, snitch, snitcher, stoolpigeon, stool pigeon, stoolie, sneak, sneaker, canary