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.
Also known as a "barnacle." This sea creature makes home to a sharp and hard surface, in which it hides in while not feeding. The reason it is called a "Volcanus" is because it resembles a Volcano and a Anus at the same time. They cling to rocks, whales, sharks, and other ocean dwellings. Known for a high bacterial content, most SCUBA divers and snorkelers wear gloves when traversing underwater reefs to protect their hands from being cut. If cut by a Volcanus, the injury will not heal completely for a few weeks, thanks to the high bacteria percentage in the creatures hard surface.
(Volkilnos the Volcanus Voyeur invented the term.)
Intense diarrhoea, resembling a volcano. So intense that when fecies exits, it does so at such speed to cause a splash in the toilet water which makes contact with the buttocks.