以卵击石 ------- throw a straw against the wind

例句：
A: I'll challenge the world boxing champion.
我要向世界拳击冠军挑战。
B: Oh, no. You'd better not, or you'll be a dead man because you just throw a staw against the wind.
噢，不。你最好不要，否则你死定了，因为你只是以卵击石。

同义词：
ran one's head against a stone wall
Whether the pitcher strikes the stone or the stone strikes the pitcher, it is bad for the pitcher.