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A male homosexual who likes to give, or take it "up the ass".
Yeah, he's a real "backdoorsman"!
by Powernerd July 03, 2010
Gentlemen of the highest quality risking their lives everyday by committing themselves to the exploration of female orifices, particularly but not limited to, the anus. (pronounced "A nooos")
The backdoorsman drank 10 glasses of scotch while enjoying the company of many women all ready for exploration
by Backdoorsmans club July 10, 2012