the biter gets bit
A person who has committed wrongs is now experiencing the same kind of torment, adversity, etc. She's always bullied me, and now she's getting a taste of her own medicine. Looks like the biter is getting bit. Ah ha, the biter gets bit! A prankster deserves to be the target of his own tricks once in a while.
the biter gets bit
BRITISH, OLD-FASHIONEDYou say the biter gets bit to mean that someone suffers as a result of their own actions, especially when they were intending to hurt someone else. Sympathy seldom abounds when the biter gets bit. Note: `Biter' is an old word meaning a swindler (= person who cheats people out of money).