pay back (2)
Meaning: If you pay someone back for doing something bad to you, you do something bad to them in return.Synonym: get back at
- pay sb back Jim was angry after I fired him and he said he'd pay me back one day.
- pay sb back for sth The kid who shot fifteen students in his high school said he was paying them back for all their insults and put-downs.
Ian said he was going to pay Harry back for telling the police that he was