A sexual act involving two girls and a guy. An girl poops, yet does not wipe the residue from her but. The man then pees in her but hole, making a "murky lake". The other woman then slurps up this concoction, usually through a straw, preferably a curly and colorful one.
woman: "I was tasting poop for a week after that murky lake."
by JROB73 May 14, 2007