A combination of the words "fart" and "butt", showing immaturity through a lack of a better insult.
"Go buttfart out your fartbutt, butt farter!"
door Gareth J 18 mei 2007
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.
door BiGMerK215 8 november 2010