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.

Butt Gusting by Jason Henderson Amare April 20, 2013

gusting a butt

1) Laughing so hard at a semi-comical joke that your anus begins to ache.

2) Releasing of severe flatulence to the point where your rectum starts bleeding.

1) "I laughed so hard at Tom's stupid joke that my booty hurts from gusting a butt."

2) "Man, that chili grande did my ass dirty. I think I need to go home and put some Neosporin on my bootyhole cause I just gusted a butt."

gusting a butt by Dr. Nooch June 22, 2012

Buttjusting 

Adjusting your butt in your chair while gaming or streaming.

"gimme a sec, buttjusting a bit"

Buttjusting by PhilosoPhoenix August 2, 2016