Fartbutter is a fart let out with a little wetness that stays in between the buttcheeks. It makes your buttcheeks slipper, so they slide back and forth as you walk or even run. So as the old saying goes "slippery when wet"
Damn, my ass has enough fartbutter build up in it.
fatbutt one who is a fatass or has a big ass a non vulgar less offensivealternative to calling someone a fatass when calling someone a fatass is inappropriate or unwanted
fatbutt fell and could not get up and he had to have paramedics help him up it was a pitiful site
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.