即以其人之道，还治其人之身

词语解释

1. [do unto them as they do unto us;answer a fool according to his folly;deal with sb. as he deals with you;does sb. with his own physique;give sb. a dose of his own medicine;pay sb. back in his own coin;requite like for like;pay back in kind] 就拿这个人整治他人的方式,反过来整治这个人本身

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国语词典

1. 就用那个人对付别人的方法来对付他本人。
   1. 如：「他如果再使坏心眼陷害你，你即以其人之道，还治其人之身，叫他尝尝痛苦！」