when you gape someones asshole then pour in vinegar and bi carb soda then but plug it give them a shake unbutt plug it then watch it explode out brown shit like a black volcano (nigerian volcano)
nigger 1: yo i did some kinky shit with this girl last night
nigger 2: yo what you do
nigger 1: a nigerian volcano my nigger
nigger 2: yo thats eetswa
nigger 2: yo what you do
nigger 1: a nigerian volcano my nigger
nigger 2: yo thats eetswa
by An Oscar February 03, 2021
A polynesian volcano is when you empty a bag of pop rocks in a gaping asshole, then pour a can of coke in and hurry and shove your dick in and hold it there until her ass explodes like a polynesian volcano.
by Bostonian Balls February 08, 2019
by Bthibs October 14, 2011
This is when you stand someone upside down on their head and shoulders right before they have to shit, urinate in their butthole, then kick them in the stomach so hard that they shit with a volcanic-like explosion.
That jerk learned who was boss after I kicked the shit out of him and he tasted his own Muddy Volcano.
by Johnny Ock October 20, 2006
The result of eating and digesting a ghost chilli while suffering from diarrhea. You have been warned.
by Dark Night Enforcer January 28, 2015
by sandersscotty February 24, 2009
The girl must have explosive diarrhea first. When having sex, get the girl on her back and left her legs above her, then have her shit up like a volcano and get it all over your face. Originated in Russian. Thus Russian Volcano
My girl explosive diarrhea, and we wanted to do some freaky shit in bed. So we decided to do the "Russian Volcano". That shit was foul.
by BigPlayaWetback April 24, 2009