This word is used for fat people that smell horribly bad. It doesn't matter if their asses are clean, as long as they smell bad, its always considered to be buttstank.
That Charlie has mad buttstank, and I want to suck his weaner.
Slang for when someone propels themselves through a still body of water, usually a swimming pool, entirely by passing gas.
This amazing and talented young woman apparently has the most powerful farts on the planet; I watched her doing the buttstroke the entire length of the high school gym pool!
When a person is born with the parts to form a butt (butt cheeks) but no flesh ever properly forms in it, so that the prson doesn't have the natural roundness of a butt and are therefore forced to sit on the extension of their thighs for lack of a natural butt. Or in simpler terms- lack of butt meat.
Hold on, is that Crystals's thighs or just her vestigial buttsack that's creeping from the top of her jeans when she bends over?