a taste of your own medicine 以其人之道，还治其人之身

短语 'a taste of your own medicine' 的意思是你曾经怎么样对待别人，现在别人也用同样的方式对待你，让你自尝苦果，以其人之道，还治其人之身。

例句

Now you see how it feels to have someone call you names! You are getting a taste of your own medicine!

He got a taste of his own medicine when she decided to turn up late.

请注意

另一个短语 'laughter is the best medicine' 意思是笑能治病，笑能养身，其实就是汉语里的所谓笑一笑十年少。