give (one) a taste of (one's) own medicine(redirected from gives them a taste of their own medicine)
give (one) a taste of (one's) own medicine
To do something (usually unpleasant) to someone who usually acts in the same way. Bill is always excluding me from things, so I'm going to give him a taste of his own medicine and not invite him to my party. This team likes to play tough defense, so let's give them a taste of their own medicine and not give them any space to score.