敲竹槓

Simplified: 敲竹杠

qiāozhúgàng ㄑㄧㄠ ㄓㄨˊ ㄍㄤˋ

    • extortion by taking advantage of sb's weakness

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Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
tap the bamboo pole
Meaning
To extort money from someone by exploiting their weakness, or to overcharge. Critical; like 'rip off' or 'fleece'.

Sources