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1. A homosexual bro.

2. The 2007 album by Brodeohead. A Broternative rockband from Brofordshire, England.
1. I'm going to hang out with my Rainbro, but I mean, as friends, ya know?

2. Favorite song of In Rainbros? Got to be Weird Fishes/Broppegi.
by RToffler June 03, 2010
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8
Sista 1 says: That man is FINE!
Sista 2: Girl, redirect. He a rainbro.
by LLLLLLLAM January 02, 2010
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9
A group of male friends who share the same passion for catching rainbow trout.
Went out and had an awesome day fishing with my rainbros
by Yawbow fisherman February 12, 2017
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10
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.
by ErockNRoll October 31, 2009
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11
An extra softboy. Isn’t afraid to cry. Used the 🌈 emoji too often.
Girl: Edgar sends me rainbow emojis all the time.
Guy: oh yea he’s such a rainbro.
by Jim124578 August 19, 2018
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