Bust Buddies

Two or more friends, bros, mates, or lads who have busted on, or in, the same girl

Simple;
Guy 1: Hey Slater, I heard you fucked Becky last night.
Guy 2: Yeah Chad, we're bust buddies now!
Traditional;
Lad one: Edwin, I have word that you have had intercourse with lady Elizabeth.
Lad two: Your word is good dear Charles. We are indeed bust buddies.