St. John Underwood's definitions
It is a derogative term used to offend some one who is of homosexual nature or perceived to be of homosexual nature because of something they have just done.
Charles's Father: "Charles, are you looking at gay porn again?"
Charles: "No it was a pop-up"
Charles's Father: "yes you are you filthy Butt Cowboy!"
Charles: "No it was a pop-up"
Charles's Father: "yes you are you filthy Butt Cowboy!"
by St. John Underwood February 4, 2008
Get the Butt Cowboymug.