1 definition by ErockNRoll
One of the guys who is a total bro (usually on a sports team) who takes the "acting gay" thing to far and actually engages in legit homosexual activity with his fellow rainbros.
Dude1: Hey man did you see those football players touchin each other's dicks in the showers?
Dude2: Yea dude they are a bunch of rainbros.
Dude2: Yea dude they are a bunch of rainbros.
by ErockNRoll November 1, 2009