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
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!"
by America Lover 🇺🇸 November 17, 2018
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
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
oral sex with chocolate in the mouth or genitalia. Giving a sexual sensation and good taste at the same time.
Betty Sue gave her boyfriend Roscoe a chocolate fountain, which ended up covering chocolate all over her face and his lower body.
by TheOralMaster August 8, 2011