an act in which, when a fart is coming on, the asshole is elevated into the air either by situating one's self on all fours with shoulders to the floor or by lying on one's shoulders with knees to the ears, causing the asshole to open and remain so. once this state has been achieved, air can be repeatedly sucked in and blasted out, causing a signature sound that is difficult to replicate by other means.
I felt a massive fart coming on and was able to volcano for five minutes straight.
by d-lo-z November 15, 2007
1. What you call it when you get so stoned you cant even see

2. What you call it when you get so stoned you cant even believe

3. What you call it when you get so stoned you can hold your tongue
What do you call it, what do you call it, what do you call it? Volcano.
by A Turbo Fruit January 27, 2010
-3/4 glass of sprite or 7up
-1 to 1.5 shots of vodka
-1/4 to 1/2 scoop of 'fruit punch' poweraid powder (amount dependent on cup size)

1) Pour sprite/vodka mixture into a glass or pitcher (if making multiple volcanos) 2) place powder into drinking glass 3) rapidly pour sprite/vodka mixture into drinking glass with powder

Once the sprite/vodka mixes with the powder the drink turns red and starts to fizz out of the glass, something of an eruption takes place. Yell VOLCCCCAAAANNNOOOOO!!! when the eruption begins. VERY messy drink to make.
Your at a house party and your tired of beer and shots.

You set up 10 glasses of volvanos gather everyone around and set off the fireworks. Instant party classic.

Got to love the volcano.
by Ravi-God November 27, 2007
A sexual position involving at least one male. When the male is about to ejaculate, he lies on his back with his penis sticking up. He then shoots his load up into the air and back down. The other member of this sexual intercourse will then have the pleasure of watching the cum ooze down like lava or licking it off.
Beth's boyfriend was too fat to get off his back, so he just did a volcano and Beth just watched it ooze.
by HooShawNaw May 10, 2009
When you're leaned back on your shoulders with your knees behind your ears lighting a fart and diarrhea comes out after the fart, thus creating the eruption effect.

In order to be a true volcano all three factors need to be present. Gas, diarrhea, and lit flame!!!
"Dude! I almost burned my house down!! Did you see me volcano?"
by DanOAngel April 23, 2009
An opening in the earth's crust in which molten rock, ash, and gases are released.
I wouldn't want to live near an active volcano.
by Aaron Ferber April 09, 2006
When you are have anal sex with a male or female and they fart with poop following!
I was butt fucking my girlfriend then she volcanoed!
by Talosyn February 18, 2014

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