To become reconciled; forget past animosity: Mandela and his rival Chief Buthelezi, whose followers have been slaughtering one another by the thousands, have kissed and made up(1940s+)
Idioms and Phrases with kiss and make up
kiss and make up
Settle one's differences, reconcile, as in The two friends decided to kiss and make up. This colloquial expression has largely replaced kiss and be friends, dating from the 1400s. [ Mid-1900s ]