From Longman Dictionary of Contemporary Englishget even (with somebody)get even (with somebody)informalREVENGE to do something unpleasant to someone to punish them for something that they did to you SYN get revenge (on somebody) I’ll get even with him one day. → even
Examples from the Corpus
get even (with somebody)• A sexy female boss hiding dark family secrets from her past and using her street smarts to get even.• When your world falls apart, do you get mad, get out or get even?• You need 100 percent gain from $ 25 to $ 50 to get even.• The others expected and got little enough: they got even less.• If they could get even some of the men in Grantley to take the blood test they would be half way home.• After Alyssa and Holden hook up, things get even weirder.• I'll get even with you -- just wait!• By the time I had managed to contact mum on the telephone the flooding was getting even worse. 