Anal volcano

Pouring a can of Coke or Pepsi into someone's asshole and having them defecate an acidic shit solution back out.

Guy: "Trust me honey, it's ok, I was told diet soda creates a less painful anal volcano."
Girl: *muffles inaudible dialogue through a muzzle*

by fun4thewholefamily May 5, 2014

Pneumonoultramicroscopicsilico volcano

Pneumonoultramicroscopic silico volcano coneosis (45 letters -- had to misspell it to fit in Urban Dictionary -- merge all of the words togeather); a lung disease caused by breathing in certain particles) is the longest word in any English-language dictionary. (It is also spelled -koniosis.)
On Feb. 23, 1935, the New York Herald-Tribune reported on page 3:

Pneumonoultramicroscopicsilico volcano-koniosis succeeded electrophotomicrographically as the longest word in the English language recognized by the National Puzzlers' League at the opening session of the organization's 103d semi-annual meeting held yesterday at the Hotel New Yorker.
The puzzlers explained that the forty-five-letter word is the name of a special form of silicosis caused by ultra-microscopic particles of siliceous volcanic dust.

His Pneumonoultramicroscopicsilico volcano koniosis made him cough-up black phlegm and blood.

by Aaron M Smith October 17, 2006

Chilean Volcano

Is when you get fisted in your arse and you seep blood vigorously; also reffered to as being stuck in Melbourne due to plumes of ash from a South American volcano

My anus is bleeding cause of that Chilean Volcano

Dang! We're stuck in Melbourne due to that Chilean Volcano

by Volcanic Hispanic June 14, 2011

Volcano Season

When a female is on her period and wants to be discreet about it

Jon:Bae when you gonna let me fuck you from the back again?
Cici: I can't, it's volcano season this week.

by YangTheLoner May 19, 2015

nose volcano

when someone peforms fellatio on you until you ejaculate, then before they have a chance to swallow it or spit it out, you put your hand over their mouth and tickle them so the splooge flies out of their nose(reminiscent of milk at the elementary school lunch table)

I didn't want her to suck me off ever again, so I gave her a nose volcano

by Brandi B. December 16, 2004

The Braille volcano

when a woman with a prolapsed anus explosively shits diarrhea on a blind man's face.

Did you hear about Ricky? Some chick gave him the Braille volcano.

by 82ndABN March 18, 2009

Volcano man

A pissed off person.

My friend was a volcano man when i got his sister pregnant.

by Bobby Richards February 26, 2010