捶破鼓

chuípògǔ ㄔㄨㄟˊ ㄆㄛˋ ㄍㄨˇ

    • to attack someone who has lost power or luck
    • to kick a man when he's down

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
pound a broken drum
Meaning
To attack someone who has lost power or luck; from 'when the wall falls everyone pushes, when the drum is broken everyone beats it'. Critical. Close to 'kick a man when he's down'.

Sources