n. Physical awkwardness occurring between bros and brahs at the moment their "fraternal" relationship takes a turn for the Greek.
In a sick/hot moment when their eyes met through the haze of booze at the frat party, Erick's and Zack's sudden, unintended broners told them that nothing would ever be the same between them again.
by MudFlap33 August 06, 2011
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