The act of taking a shit and piss on your partner's chest and then sliding through it and splashing it on their face like the Pittsburgh Plunge ride at Kennywood. Also similar to a Slip N Slide.
Dan: "Hey Rose do you want to try the Pittsburgh Plunge?!"
Rose: "Sure! I hope you have diarreah so its extra slippery!"
Rose: "Sure! I hope you have diarreah so its extra slippery!"
by GoPens June 12, 2009
Get the Pittsburgh Plungemug.