A heterosexual man who engages in anal sex with other men and who has other negative personality traits which come together in the expression "Bumholer". It does not have any negative association to such acts between gay men, but is more of a catch all phrase for a stupid, thoughtless, can't figure out where his penis properly goes type of male.
The term first came into widespread public use through the online gambling forum www.peepsplace.com. It was applied by poster Paddy to poster ATX, a widely discredited figure on the forum who had posted videos of himself leaping off the roofs of buildings and badly injuring himself and claimed to be the gay wrestler Ric Flair. He became known as a "...roof jumping bumholer."
by Calvin Ayre August 18, 2011