ㄙㄨㄣˇsǔnㄖㄣˊrénㄅㄨˋㄌㄧˋㄐㄧˇ

  1. 使別人蒙受損失自己不到好處吃力不討好損人不利己最好。」

to harm others without benefiting oneself (idiom)​