This phrase generally means homosexual,anal intercourse. This phrase finds it's origins in the 2006 release of Brokeback Mountain, a movie about homosexual cowboys. This is most commonly used as an insult between friends.
by Azagthoth February 13, 2006
A description of Anal Sex generally between two males though not limited a male and a female, or two females (one of whom wears a strap-on phallus))
by stpvoodoo1 January 31, 2006