Guffart

The act of laughing so hard that muscle control is temporary relaxed, resulting in the droppage of ass.

From colloquial "Guffaw" and "Fart."

Similar words include: Shart, Snart

"Wow, that was a great burrito. Whoa, did that fellow just slip on a banana peel? How funny! Oh my god I think i just guffarted."

by Doc Daredevil Dagwood Dipthong January 6, 2007