Top Definition
Laughing so hard you fart.

The opposite of a Gut Buster.
Mary: A sandwich walks into the bar, the bartender says, "Sorry, we don't serve food here."

Larry: That was so funny I just let a Butt Guster go!
by Marie1967 September 21, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.