You find someone willing to do a medical procedure (preferably a friend) called a fistula to connect your bladder and rectum so you pee and poop at the same time out of both orifices. Next you take an exaggerated number of laxatives or give yourself C. Diff to make everything inside of you liquid. Take your friend and you shit and piss out of both your butthole and peehole all over their face.
Person 1: Yo my friend in medical school surgically connected my poop Schute and urine sack in his basement so I can give my girl the chocolate fountain.

Stranger 1: get away from me
by Rogue Steel October 3, 2018
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The result of a big bag of chocolate on top of a hot train roof
"Yes, open your mouths, it's our very own chocolate fountain!"
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When you do a handstand while having diarrhea.
George: I’m bouta give my girl the chocolate fountain treatment tonight wish me luck.

John: What the fuck is wrong with you?
by JJ Charlemagne September 8, 2020
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When a girl who's got diarrhoea gets shit in her vaginal orifice and squirts. The resulting mixture shit and squirt creates a "CHOKOLATE FUNTAIN"
"What did you shower your peanuts in?" "A chocolate fountain."

"Do you have shit in your eye?" "Yeah, my girlfriend gave me a chocolate fountain."
by Mr. T. Shingles November 19, 2013
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He act of sticking a mans penis partially inside a woman's asshole while she has explosive diarrhea all over the mans dick. Causing a fountain like affect as the liquid shit drips down his dick.
"Man, I really wish I could of given her the chocolate fountain, but Joe did it first."
by Pubesonfire420 October 10, 2015
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When having anal sex with another man, you position him so his anus is facing the ceiling. After you climax, pull out quickly, causing feces to rush out towards the ceiling creating the chocolate fountain. Bonus points for receiving a facial from the fountain.
Damn, after that chocolate fountain im gonna need a shower
by FatAndSassy December 18, 2005
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