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41.
An erection, or great joy attained by any heterosexual male, as a direct result of something that his buddy (or "Bro") says, does, or shows him. A Broner can also be attained by any man as a direct result of his favorite sports teams performance, comentators talking about said teams dominance, and highlight reels of said sports team.
Every time Dan tells me about his sexual conquests with strippers, I get such a broner!

When (insert favorite RB's name here) had that 92 yard Touchdown run lastnight, I got a massive broner!
by Owen David November 30, 2011
 
1.
A slang term used to explain the phenomenon during which a fiercly heterosexual male achieves an erection (or, "boner") for or while in the company of one of his male friends (or, "bros"). This may only occur while engaging in all-male activities, particularly those which include feats of strength or displays of hyper-masculinity. Upon achieving a broner, the man in question is often known to exclaim, "dude, suck that shit!" or "meet me in the shower."
The way you creamed that linebacker gave me a total broner.
by Delongpre Dannon February 03, 2007
 
2.
When a fan of my little pony get's an erection.
When Derpy first spoke I got a wicked broner.
by Brony98 September 02, 2012
 
3.
An unintentionally manly inspired boner.
You're a guy getting a massage from another guy, and its nice, its relaxing then all of a sudden you get a little tingle; that my friends, is a 'broner'.
by Addeh September 11, 2007
 
4.
An unintentional man-inspired boner
My masseuse was a guy and during my massage I popped a slight broner.
by Commander William Riker September 02, 2008
 
5.
The accidental erection, or boner, induced by a male friend.
Oh shit, we gotta stop wrestling, i'm getting a broner.
by McCullo January 28, 2009
 
6.
An erection inspired by the actions of your buddy- be they sexual or just plain impressive.
“Dude, I saw you catch so much air off that jump that you gave me a broner."

Abbreviation: Brone
by Garrick Douche' November 02, 2009
 
7.
An unintentional boner from your guy friend.
Dude check this out! stop man your totally givin me a broner right now.
by gex479 October 08, 2009