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Having severe diarrhea with a large amount of gas that expels the near-liquid foamy fecal matter, much like the volcano that destroyed Pompeii.
"Dude, you've been in there a long time..."

"I'm going to be a while"

"It sounds like you broke the toilet"

"Yeah, carrots give me vesuviass"
by IAMCORNHOLIO October 19, 2012