An unintentional man-inspired boner
My masseuse was a guy and during my massage I popped a slight broner.
by Commander William Riker September 2, 2008
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An erection caused by an extreme moment of bro activity, including the noticing of a sick new lax pinny, fresh flow, an ice cold case of natty, etc.
Chad: Dude, did you see Brantford's new spoon? It's fucking sick!

Mike: Totes dude, completey popped a broner after seeing it.
by Bob Donatucci January 29, 2011
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When a bunch of guys just hang out and everything is good. You become relaxed and all of a sudden feel a slight girth growth from below. It soon swells in accordance to the amount of broness in the surrounding area. No girls allowed. Discussion topics to insight a broner can include, but not limited to:

Boobs
Anime (esp. tentacles)
Broners
winking assholes
football
DragonBallZ
skull fucking
gerbils
Goose proudly displayed his raging broner to the class after a night long tandem session of goodness. Unbeknown to Goose, both Dave and Mike also had broners.

Broner Tandem Diagram:

Mike 8==>, Goose 8==>, Dave 8==>
by dfarbe1 November 22, 2009
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Occurs when your bro does something that is so brotastic that it gives you a boner.
When Stano hooked up with Emily it gave me a broner.
by Hot Boy Carl August 31, 2010
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A boner obtained while hanging with your bros. It usually requires an awkward explanation and is followed by constant reminders and gay jokes.
Ted: "Hey is Jake coming tonight?"
Mike: "Hell no last time he got a raging broner and hasn't left his apartment since!"
Ted: "Holy shit!"
Mike: "I know i slipped a dong bomb in his drink."
by Cm24 July 1, 2012
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Erection that is the result of close contact with a male friend
If my girlfriend figures out that I have a Broner, I am fucked.
by Beelzebubba June 10, 2016
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When a guy idolizes frats too much.
"Doug said he is only going to college to join a frat. That dude has a raging broner."
by Akaniradru June 17, 2013
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