汉字手册：猫鼠同眠释义、词组和例句

[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！