An unpleasant occurrence in which the derriere of an individual begins to evacuate furious amounts of fecal matter, at which point it becomes known as a "vulcanus"
"I shouldn't have had the 4thtaco. I feel a hell of a vulcanus coming on."
A term used to describe the unbearable burning sensation of your anus during a bowel movement that usually occurs after injesting spicy, exotic, entrees
That Thai food gave me volcanus. I was late for my meeting because I had to put the flames out.
The hole of a volcano, which spouts out lava and smoke during an eruption.
Mount Pinatubo must have had a huge volcanus to black out the sky for so long after it erupted.
"You're from Iceland? That's just one whole island of volcanuses...you can't trust people who live on volcanoes, and I certainly wouldn't lend them money"
After eating a pizza topped with chillies, John's anus felt like a volcanus.