A butt with a shape similar to that of a Goomba, the brown, mushroom-like enemy from the Super Mario video game franchise. Like a trapezoid with rounded corners, the butt is wider at the bottom than the top and horizontally flat across the lower edge. In form fitting pants, rather than looking like a pair of melons, the goombutt looks more like an underfilled water balloonsitting on a table.
I thought she looked good, but then she turned around and saw that she's got a goombutt. That chick needs to get her ass to the gym.
A common and and undesirable problem that occurs when one does not wipe themselves after defecating (pooping). It can also occur after one poops but wipes well and then engages in an aerobic excersise, this situation is often called swass(Literally "sweaty-ass"). Do the human race a favor and just wipe.
A cigarette butt found in ash trays and sidewalks that can be smoked when money and cigarettes run out. Typically good for one or two hits before you start burning your lips.