A Bromosexual, is a person who performs a sexual favor for his "bro", yet insists it isn't homosexual. This act is known as an act of bromosexuality. Bromosexuality is normally performed within groups of bros or a "crew" from one "homie" or "bro" to another. Often times bromosexuality is a result of little sexual activity with a woman or women, boredom and curiosity, or perhaps closet homosexuality.
J-Cool: "Brah, i could really go for a BJ right about now, man. I haven't even seen pussy in months..."
D-Bro: "Well, i could...you know...help you out or somethin, man."
J-Cool: "Yeah dude, that'd be night, but it's definitely not gay or anything."
D-Bro: "Fa sho, dude, not gay, just, you know...bromosexual."
Both: "No Homo."