When you push a can of cheese wiz into your partner's asshole, then proceed to dish it out onto Ritz crackers for the party.
by Freakshow420 January 28, 2021

Traipsing joyfully through public fountains or water features, generally with a group of friends, and often in a flirtatious or playful manner.
During their last evening together, the travellers removed their shoes and enjoyed some well-deserved fountain-frolicking before heading back to their rooms.
by Syl-girl July 7, 2023

by Target359 February 5, 2015

When a girl is deepthroating her partner and projectile vomits as a result of her partner's ejaculation.
"This girl was giving me head and puked all over when I came in her throat"
"You just got mouth fountained motherfucker!"
"You just got mouth fountained motherfucker!"
by ShaggyTheBear September 28, 2017

The result of a person knowing everything about you, without you knowing anything about this person, probably because a friend of yours has told this person your whole life.
Jessica: "Hey George, I know you like furry porn with old ladies."
George: "HOW?! Is this the Fountain Effect? Not again!"
George: "HOW?! Is this the Fountain Effect? Not again!"
by Silience March 16, 2021

When ones partner is close to climax the man pulls out a 12 gauge shotgun and fires in into the back of their partners head causing the fruit punch fountain
by Gaybuteggs January 17, 2021

friend 1: i have mentos in my prison wallet and am proceeding to pour coke into my rectal cavity
friend 2: oh no your anus is exploding with coke and a nice menty smell creating a bum fountain
friend 2: oh no your anus is exploding with coke and a nice menty smell creating a bum fountain
by bumfountain123 December 2, 2019
