Butt Gusting

A. When you laugh so hard you fart.

B. When a fart sounds extremely funny.

I had a good Butt Gusting laugh after I let out a squeaker.

by Jason Henderson Amare April 20, 2013

butt gust

when the gluteus maximus expands in such a manner where your pants become undone, or the associated breakage of the lower garment fastening device due to ass expansion.

had to buy new pants today when i butt gusted the button into two pieces.

by gabmab October 21, 2013