When spicy or bad foods cause indegestion leading to diarrhea. The common feeling of lava running out of your sphincter.
spicy food in , and spicy food out

"I dont think its a good idea to eat all this spicy food, you might get lava ass later."
by Loser471 August 24, 2015
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When you immediately sit down on the toilet and your ass explodes like a volcano.
After eating Taco Bell I barely made it to the bathroom with a severe case of lava ass explosion.
by Joey Norris January 4, 2019
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1) The variety of diarrhea one has after the consumption of VERY spicy foods. 2)The end result of eating hot wings with sauce hot enough to burn a hole into the table.
"Matt jumps into someones yard and just lays out some hot ass lava all over their lawn while screaming MORE NAPKINS MORE NAPKINS!"
by Stangman68 June 23, 2006
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