Having sex with an ex or anyone else you have previously banged but stopped banging for one reason or another.
My ex was in town, it probably shouldn’t have happened, but we totally rebanged.
Rebang: define #2
When two newly single/heartbroken people engage in sexual intercourse but aren’t ready for a rebound relationship.
Trey and Aaron were just out of long term relationships and not ready for a rebound, just a rebang.