就是抄袭别人的办法来迫害那个人自己。出自宋。朱熹《中庸集注》第十三章：“故君子之治人也，即以其人之道，还治其人之身。”

to give sb a taste of his own medicine; to use an opponent's own methods to obtain retribution (idiom, from Song dynasty neo-Confucianist Zhu Xi 朱熹); to get revenge by playing sb back at his own game