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1.
when poop is dipersed out of your rectum at an alarming pace, much like a fountain
i got so sick, i was a shit fountain
by Johnnnnnnnnnnnnnnnn October 06, 2003
 
2.
When you're on the toilet taking a shit, and you pick up that huge cup-shaped thing filled with water, wash your ass with it, and the water floods over the toilet, infested with ass juice.
I accidentally shit fountain'd myself yesterday.
by D. Rodriguez October 28, 2010
 
3.
Is a fucking disgusting sculpture in Chicago. Thank G-d it doesn't smell.
Pics of Shit Fountain are frequently used in Wikipedia vandalism.
by Goon Man August 14, 2006