A combination of the words "fart" and "butt", showing immaturity through a lack of a better insult.
"Go buttfart out your fartbutt, butt farter!"
Gareth Jによって 2007年05月18日(金)
A female whos private areas most likely reek a unsanitary odor. A typical fart butt will recycle under garmets and hamper dive her clothing repeatedly. This type of female is typically unattractive and over weight. If the severity of the girls clenliness and appearence is to the utmost extreme they can be redifined and graduated to a poop butt.
Thats girls thong was plastered to her ass, what a fart butt.
BiGMerK215によって 2010年11月08日(月)
V. When you do a raspberry on someone's butt cheek.

N. A game of grabass where you run around and try to do raspberries on each other's butt cheeks. Best if played on a cold ocean shore.
Megan played Fart Butt last night and lost big time.
GrantHamiltonによって 2006年01月29日(日)

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