ˇㄌㄨㄢˇㄐㄧˊˊyǐluǎn‑jíshí

以卵击石
yǐluǎn‑jīshíㄧˇ ㄌㄨㄢˇ ㄐㄧ ㄕˊ
  1. 比喻自不量力招致失敗以卵投石」。 烏合之眾精銳部隊抗衡簡直以卵擊石」。

lit. to strike a stone with egg (idiom)​; to attempt the impossible, to invite disaster by overreaching oneself