idiom > regard as useless
Contents
Treat soil mustard
  Explanation: Mustard: grass. Considered as soil, grass generally look down upon. Analogy is not looked down on.
  Source: "Mencius from the Lou down" the king of the soil, such as mustard, as minister, the minister as the monarch as foe. "
shì rú tǔ jiè
  Mustard: grass. As similar soil, as grass. Analogy very lightly
Translated by Google
No. 3
  成语发音:shì rú tǔ jiè
  成语释义:芥:小草。看作象泥土,小草一般轻贱。比喻不放在眼里。
  成语出处:《孟子·离娄下》:“君之视臣如土芥,则臣视君如寇仇。”
English Expression
  1. n.:  regard as useless