- pay someone back
- pay someone back†1. Lit. to return money that was borrowed from a person. •
You owe me money. When are you going to pay me back?
•You must pay John back. You have owed him money for a long time.
•You have to pay back everyone you owe money to.
2. Fig. to get even with someone [for doing something]. •I will pay her back for what she said about me.
•Fred eventually will pay Mike back. He bears grudges for a long time.
•He intends to pay back everyone who has wronged him!
Dictionary of American idioms. 2013.