雞蛋碰石頭

Simplified: 鸡蛋碰石头

jīdànpèngshítou ㄐㄧ ㄉㄢˋ ㄆㄥˋ ㄕˊ ˙ㄊㄡ

    • lit. an egg colliding with a rock (idiom)
    • fig. to attack sb stronger than oneself
    • to overrate one's abilities

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Sources