Me and my GF just got back from Bernies Burritos and things got a little steamy in my car and in mid thrust I had a Mount Saint Helens. She then proceeded to lick my butthole.
by Merrick and Smitty January 28, 2010
A sex act in which a male pours pop rocks into a female's anus, pours in some cola, and has anal sex with her without a condom.
by evilempire August 16, 2010
A super intense ejaculation of sperm. An explosive orgasm, where hot sperm shoots out like a lava flow.
" I met a really hot Geologist last night. We were making out, and I got hard enough to cut diamonds. I took her back to my place, and I explored her cave for awhile. I totaly Mount Saint Helensed! Holy Schist,She got my rocks off. I had a gneiss time.
by Big Foot In A UFO July 9, 2004
This sex act is highly contagious. It involves seducing a nun with two men. Both of these will feed the nun with cheesy gordita crunches laced with laxatives. Afterwards, the two men will pour chili down the nun's ass and proceed to ass fuck her. Soon, she will not feel good as her stomach starts to ache and this is when you should prepare for eruption. The two men lay below the nun and the nun finally let's out the biggest, bloodiest shit, erupting onto the mens' face while proceeding to announce verses from the bible. This sex act reenacts the Mt St Helen eruption in 1980. This sex act is highly encouraged as you become closer to god and understand the full capability of a volcanic eruption.
Hey man. You wouldn't believe what sister Lisa let Dan and I do. She let us try a Mount Saint Helen on her.
by Damnstr8mmmmm November 15, 2017