After any group or groups of persons, gay or straight, engage in anal intercourse, the
man who's penis has been inside the other person's rectum, uses his
now fecal covered penis to
draw a picture, using the person's fecal matter, on his or her back. Sort of like a poopy game of Pictionary. The draw-ee, as it were, tries to guess what the draw-er is drawing.
"So check this out Bro, Josh and I were Brown Backing last night and he
drew the logo for the Chiefs on my back! I totally got it before he was
even finished! Brownbacking
Kansas Governor Sam Brownback brown brown backing brownback