吃豹子胆

Traditional (Taiwan): 吃豹子膽

chībàozidǎn ㄔ ㄅㄠˋ ˙ㄗ ㄉㄢˇ

    • to be extremely bold
    • to have a nerve

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Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
eat leopard gall
Meaning
To be extremely bold, often rashly so. Used in exasperation or amazement: "Have you got a nerve?"

Sources