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2.
is unexpected flatulence or 'fart' that occurs due to laughter.
She laughed so hard, she accidentally let out a booty-bubble.
fart flatulencebottom burpbreak windcut the cheese
by Thundercat832 January 25, 2011
 
1.
The appearance of the inner rectum after something huge has been stuck up someone's ass. It blows out like a red bubble, and then deflates back to its normal size.
'Her booty bubble blew out so big, the bitch almost took off'.
by Matty November 22, 2004