when a man or women shits into another persons anus or vagina and then that person pushes with great force to push the shit back out thus, the volcano.
the volcano can be preformed with the ass or vagina facing up into the air, so that the shit goes up rather than down, this method i can also be called the shit fountain.
another method can be to stand up afteer the shit was entered and once in standing possession, force the shit out so its falls, this method can also be known as the shit waterfall.
" oh my god man, i just did a volcano to my girlfriend."
by julian mcqueen March 14, 2010
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sara: Do you see that girl in the last nights clothing with raccoon eyes?

jess: yea she's such a volcano
by melmelyell September 23, 2011
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when a girl cums during sex, or when fingered.
last night, she was like a volcano.
by mikev May 26, 2006
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when a woman is fucked so many times her vaginal swells, turns red and the cum just erupts from her vaginal because its just that full.
Wow, that hooker last night had a volcano.
Damn! That bitch got gangbanged, I bet she got a volcano now.
by repo wizard November 20, 2009
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When your going down on a girl who is on her period and you suck some of the blood out of her and lean your head back and bubbles it out of your mouth causing the erruption effect!
Don't really have an example its pretty self explainitory but i wouldn't try the volcano if you and her both dont have a strong stomach.
by M Sinister June 21, 2007
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A move performed during masturbation that involves the man jacking off and right before ejaculating the man ties a string right below the head of his penis and tying it so tight that it cuts of circulation blocking the ejaculation process. Then after 30 seconds while the cum is building up in the lower part of the man's penis, the man unties the string and his cum blasts out.

If preformed correctly the man's cum will look red like lava as a result of blood mixing with the sperm.
Man I just did The Volcano to myself last night and now i feel messed up.
by jobo1234 February 4, 2011
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Just like us, the very thing we dwell upon has pimples too. Volcanoes apear in many shapes and sizes on the face of the Earth with no clear way to dispose of them.
by Memberberry Tea December 18, 2018
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