A shit that looks like soft serve ice cream that is so large in volume that it actually sticks up out of the toilet water forming a volcanic like peak.
My stomach hurt so bad from eating those burritos, I sat down on the toliet and made a volcanic soft serve.
by moss1972 May 23, 2009
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The cloud created from a plume of volcanic ash.
Roxanne: Yeandle why aren't you on holiday?
Yeandle: That damn Volcanic Ass Cloud caused my flight to be canceled.
by boycey1 April 22, 2010
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An explosion of the rectum after eating too much food the night before.

Or

After a holiday dinner at a relatives house and you eat something that doesn't agree with your system causing irritable bowel syndrome resulting in burning or the rectum and violent ass eruptions associated with bubbling gas in the stomach nicked named "bubblin' brown sugar".
Man dem greens, macaroni and cheese hit the spot...boy! Rumble, rumble...poot, poot, fissssst. Ooooh!....Oooooooh!....Somebody help me please!...Where da bathroom at...pooot, pooot, fisssst. blurrrrrrt.....fisssst.

Ooooohwheee! got dem bad guts...what yo mamma put in dem greens man?! I gotta doodoo bad baby got a volcanic ass eruption comin' thru!
by lil dookie November 05, 2013
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covertly coating ones tongue and then perfoming a rim job on the unknowing victim.
Shawn: So, I heard that paul got revenge on his girl.

Dave: How did he do that?

Shawn: He got her with a Volcanic rim job.

Dave: That's disgusting!!
by Dirty roomie February 24, 2009
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A sticky, smelly liquid that spurts out from a males sexual organ, give pleasure, or to reproduce.
"my volcanic man flesh just erupted."
by sexy beast April 01, 2005
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