māo shǔ tóng chǔ
见“猫鼠同眠”。
《新唐书·五行志一》:“龙朔元年十一月,洛州猫鼠同处。鼠隐伏象盗窃,猫职捕啮,而反与鼠同,象司盗者废职容奸。”
猫鼠同处作宾语、定语;比喻上下狼狈为奸。
act in collusion with each other