蜻ㄑㄧㄥqīng蜓ㄊㄧㄥˊtíng撼ㄏㄢˋhàn石ㄕˊshí柱ㄓㄨˋzhù

  1. 蜻蜓搖撼石柱。比喻不自量力。《西遊記·第四十二回》：「好便似蜻蜓撼石柱，怎生搖得半分毫？」

英lit. the dragon-fly shakes the stone tower (idiom)​; fig. to overestimate one's capabilities