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Any social, philanthropic, and any other public or private gathering in which the majority of bodies attending are of the "bro" orientation.
Hey, How was the Dave Matthews concert?

It was a brocial, I left early.
by Skirv April 19, 2009
A get together with your closest friends. Usually just some bro`s broin out. Chillin.
Did you see Bean at the brocial the other night? He was naked and climbed up a balcony!
by Z-unit81 January 26, 2009