魚龍混雜
dragons and fish jumbled together;good and bad people mixed up;the genuine being mixed with the false;thread and thrum
泥沙俱下,~。The waters were muddied,and the bad became mixed with the good.
魚龍混雜yú lónɡ hùn zá
比喻好人與壞人混在一起。good and bad people mixed up, an admixture of the genuine and the fake, the bad mixed with the good