賣驢肝肺

Simplified: 卖驴肝肺

màilǘgānfèi ㄇㄞˋ ㄌㄩˊ ㄍㄢ ㄈㄟˋ

    • to give someone bad advice
    • to play dirty tricks on someone

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
sell donkey liver and lungs
Meaning
To give bad advice or play dirty tricks on someone. Critical.

Sources