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3.
When a bunch of heterosexual men and no women get together and no one is quite sure what happened during that time.
A group of guys go on a skiing trip and when asked what else they did, they just laugh, in other words, they had a brorgy!
by Imbubba! November 25, 2011
 
1.
a bromance consisting of more than 2 boys
Adam, Carlisle, Pete and Marty have a brorgy going on; they are all really close friends.
by Rory Bory Alice June 19, 2009
 
2.
A congregation or social gathering of bros where sexual interaction is commonplace and practiced through broshakes, asspats, and chestbumps among other bromosexual exchanges of bromantic intercourse.
David: Hey, I think I'm going to go to that party on Snelling.
Jack: Don't! I heard it's an all out brorgy.
David: Fuck. Thanks for telling me.
by 2PakJack (not tupac) September 13, 2008
 
4.
An event at which high concentrations of bros are present. Although sexual activity between aforesaid bros is typically absent, it is understood to be liable to erupt at any given time. A portmanteau of the the words "bro" and "orgy."
"Wow, that Jack Johnson show was a brorgy if I've ever seen one."
by alexthepagan August 07, 2008