抓把柄

zhuābǎbǐng ㄓㄨㄚ ㄅㄚˇ ㄅㄧㄥˇ

    • to find and hold on to someone's fault in order to blackmail or attack them

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Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
grab a handle
Meaning
To find and hold onto someone's fault or mistake so as to blackmail or attack them. Critical; similar to 'get something on someone'.

Sources