Usually used as a noun, behindmen is slang originating from the female hymen. Behindmen is often used as slang for when a gay male has anal sex for the first time.
Joey is more bitchy than usual because he had his behindmen broken for the first time last night.
by oak pwr September 22, 2010
What you lose when you first have anal sex.
She is such a prude but I am sure I will be able to take her beindmen.
by D-train baby April 28, 2005