a taste of own medicine
*a taste of one's own medicineand *a dose of one's own medicine
Fig. a sample of the unpleasantness that one has been giving other people. (Typically: get ~; have ~; give someone ~.) Now you see how it feels to have someone call you names! You are getting a taste of your own medicine! John, who is often rude and abrupt with people, was devastated when the teacher treated him rudely. He doesn't like having a dose of his own medicine.