give (one) a dose of (one's) own medicine

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give (one) a dose of (one's) own medicine

To do the same harmful or unpleasant thing that one has inflicted on others or to attack in the same manner in which one attacks others. Bill is always excluding me from things, so I'm going to give him a dose of his own medicine and not invite him to my party. This team likes to play tough defense, so let's give them a dose of their own medicine and not give them any space to score.
See also: dose, give, medicine, of, own

give somebody a taste/dose of their own ˈmedicine

treat somebody in the same unpleasant, unkind, rude, etc. way that they have treated you: Give her a dose of her own medicine and make her wait for you. Then maybe she won’t be so slow next time.