When you're about to shit in your fuck buddies vagina, but you instead have diarrhea and spray all over her entire body, covering her in a cascade of warm, steamy scat.
Terry: Man I had a buttload of sushi last night, then I went home and gave my girlfriend a tremondous mud fountain.
David: Did you get it in her hair?
Terry: She looked like a bowl of warm melted chocolate ice cream.
David: Foul.
David: Did you get it in her hair?
Terry: She looked like a bowl of warm melted chocolate ice cream.
David: Foul.
by Crack addicted retard whore December 9, 2008
Get the Mud Fountainmug.