泥沙俱下

níshājùxià
  1. mud and sand flow together (idiom)
  2. good and bad mingle

CEDICT

泥土和沙子隨著河流沖下來。比喻人或事物不論好壞均混雜一起。

重編國語辭典

比喻好的和壞的均混雜在一起

維基詞典

Entry Composition

1 泥沙 níshā silt
2 俱 jù
  1. (literary) all; both; entirely; without exception
  2. (literary) to be together
  3. (literary) to be alike
3 下 xià
  1. down
  2. downwards
  3. below
  4. lower
  5. later
  6. next (week etc)
  7. second (of two parts)
  8. to decline
  9. to go down
  10. to arrive at (a decision, conclusion etc)
  11. measure word to show the frequency of an action