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猫同老鼠睡在一起。比喻官吏失职，包庇下属干坏事。也比喻上下狼狈为奸。
[thieves and police work together,as the cat and the rat sleep together;act in collusion with each other] 比喻官吏失职,纵容坏人,也比喻上下勾结,朋比为奸(一个使的丫头,和他猫鼠同眠,惯的有些折儿!——《金瓶梅词话》)
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