A guy who is bromosexual is totally straight. In fact he will punch you in the face if you say that he's gay. He's so totally straight that he has sex with tons of chicks... sure his bro might be in the room with him, maybe videotaping it (with lots of close-ups of the penis)... or doing the same girl at the same time... with their penises touching...

So what if he's always slapping his broham's ass... and always hangs out in the showers at the gym... and yeah, maybe he was in a few circle jerks in middle school... and sure he puts his penis and/or testicles on his friends' faces every chance he gets when they're passed out drunk... and sure that frat initiation thing was a bit weird, but...

HE IS TOTALLY 100% NOT GAY.
Dude: You're so gay.
Bromosexual: Shut up! I will FUCK YOU IN THE ASS if you say I'm gay!!!
Other dude: Heh. Wait... what?
by Bitch-monkey December 18, 2007
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a relationship between dudes so close that, to the outside observer, may appear homosexual.
i went for support with my bromosexual to planned parenthood because of what he stuck it in last night.
by Richard Waffle April 12, 2009
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A male who is straight, but isn't afraid to show love for his bros.
"Man, that kid is so gay."
"He's not gay, he's just a bromosexual."
by The West Side Westbrook September 9, 2011
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Man who has a friendship bordering on HOMOsexual with their best buddy.
Jill: "Hey babe, where you goin?"

Russ: "Up to work to see Zach, haven't seen him in like a week and I miss him"

Jill: "Dude, that's bromosexual."
by Blitzkrieg Betti November 10, 2011
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A man who is completely straight but who every once in a while says something about a bro that implies sexual attraction. Will often compensate by saying "No homo."
Steve- "Dude, did you grow your hair out? It looks really good. No homo."
John- "Uh, thanks?"

Later...
John- "Hey, do you think that maybe Steve is gay?"
Nick- "I don't think so; probably just a bromosexual."
by I'mAWumbologist September 19, 2011
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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."
by WolfxRayne August 1, 2009
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A dude who is totally straight but if his homie ask him for a good night bj bruh it’s is homie and gives him a bj. A bromosexual is super straight but when a homie need something a homie get something.
Dude my homie is a total bromosexual but it’s chill he ain’t gay he just lookin out for his homie
by UrbanDiclord May 31, 2018
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