a game played with many men in a circle racing to ejaculate onto a bun, cake or pastry, with the person last to ejaculate having to eat the bun, cake or pastry.
hey! lets have a game of cum bun!
by jason McC May 16, 2003
Buns that are full of cum.
WOW! That bitch has SERIOUS cum buns!
by whitedevil December 18, 2003
Any man who takes it in the ass from another man. Thus leaving his buns cummy.
"Man, Chistopher is such a fuckin cumbuns!"
by Tyler J March 01, 2008