After anal sex, a large penis and or object is pulled out of an asshole causing ones butthole to turn inside out and spewing poop everywhere like an angry volcano.
Damn man, my couch is ruined after I pulled my Wiener and car keys out of her butthole and that FLESH VOLCANO erupted.
by LpCarrDsch February 15, 2017

First, one must conduct the steps necessary to make the Alaskan pipeline viable (shit in a condom, freeze it).
The Underwater Volcano is when a female voraciously pleasures herself with an Alaskan Pipeline whilst in the bathtub and on her period.
Created by A. UoS 2015.
The Underwater Volcano is when a female voraciously pleasures herself with an Alaskan Pipeline whilst in the bathtub and on her period.
Created by A. UoS 2015.
Dan: Hey Mary, fancy fucking later?
Mary: Sorry Dan, I'm on my period! I think I'll just give the Underwater Volcano a try tonight
Dan: No problem, I've heard the Underwater Volcano is a fantastic experience, enjoy!
Mary: Sorry Dan, I'm on my period! I think I'll just give the Underwater Volcano a try tonight
Dan: No problem, I've heard the Underwater Volcano is a fantastic experience, enjoy!
by ACL1380138 October 6, 2016

Jumping in your movie seat with a container of popcorn causing the popcorn to fly up in the air like a volcano.
by kidgoat April 24, 2011

When you take a dump on an airplane toilet that is so big you gotta get up and take a look. In that moment of excitement, you forget to put the seat down and hit the flush button. The vacuum toilet sprays excrement all over you and the bathroom.
Hey Greg, did you pack an extra shirt in your carry-on? I just had a Cincinnati volcano in the bathroom.
by Tbutter November 7, 2015

I was banging my girl last night anally, I came in her ass, she farted and that cum went all over the wall making a chocolate volcano.
by Kmach17 January 14, 2017

Is when your partner takes dietary pills the night before, and she holds it in until you put your balls in her anus, and all the build up of poo and diarrhea pushes your balls out of her anus causing all of the poo and diarrhea to shoot out like a volcano.
by dirtyorangepeel May 15, 2020

In sexual terms, when a female is giving the male fellatio and she stores the semen in her mouth. The female then spits the semen into the male's anus and he then flatulates the semen back onto the female's face
by Ju Ju Berr August 21, 2008
