Definitions by greengb

gaybro 

A gay man who acts masculine and is interested in guy stuff like sports, video games, military issues, grilling, knives, gear, working out, gadgets, tech, etc...

Popularized by the subreddit of the same name.

Guy1: Hey, I heard that guy is gay but he doesn't act feminine.
Guy2: Yeah he's a gaybro.

gaybro by greengb December 11, 2012