鱼龙混杂

魚龍混雜
lónghùn
lit. fish and dragons mixed in together (idiom); fig. crooks mixed in with the honest folk

CEDICT

good and bad things or people being mixed together indiscriminately

Wiktionary

比喻各种不同身分地位聚在一起。《红楼梦第九》:「现在鱼龙倒是一来你们洗清。」《文明小史第四》:「人数难免鱼龙不分。」龙蛇」。

重編國語辭典

Entry Composition