1. another word for diarrhea
2. used to describe a condition in which after anal sex, a mixture of semen and feces drip out of the anus.
1. Because I ate at taco bell, I had a muddy waterfall last night.
2. The bed sheets got wet from the muddy waterfall.
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Sloppy shit! The kind that runs down your trouser leg if you lose control. Usually after dodgy seafood, or meat with a slight 'oh that tasted weird'!
That lobster bisque must have been off. I've got the muddy waterfalls...
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When one urinates through the legs of another person who is defecating.
Pisser: "Bro, I really gotta piss!"
Pooper: "Dude... I'm taking a shit"
Pisser: "Whatever bro, lets muddy waterfall!"
When a man is sitting on the toilet taking a steamy poo while the woman sits reverse cowgirl and bangs him hard while taking a piss.
Man, the other night when I was banging my girl Kansas Muddy Waterfall style while I was taking a massive shit, she pissed all over me!