symbibrosis
A prolonged, mutually beneficial arrangement between two or more men wherein each exchanges favors with the other(s).
Bro 1: Hey man, I was hanging with that fugly bitch last night just so you could bang her hot friend. How 'bout some symbibrosis?
Bro 2: Sure man, I got your back next time we go out.
Bro 2: Sure man, I got your back next time we go out.