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The metaphorical barrier between boyhood and manhood.
Irv learned to Barbecue today and subsequently broke his bro-hymen.
by Guardians of Life at the IMA April 29, 2010
A clever way to call your buddy or brother a pussy, or a bitch.
"Hurry up brohymen." "What up brohymen?"
by Derek V February 03, 2008