the Slip n' Slide, is when you cover your bed in a plastic tarp, piss and shit all over it,and then have sex on it rolling all around in the slippery piss and shit.
When I was was five, my uncle gave me a slip n' slide, and I said this is not the same kind of slip n' slide my friends have, that's the last time I ever saw my uncle.
The act were a women will sit at the end of a slip n' slide, legs wide open. The man then proceeds to go down the slide eventually penetrating. Be weary though one wrong move and your dick will fold like a recliner.
Joe: Did you hear what Jim did with Pam.
Rylee: What?
Joe: They attempted the Slip n' slide.
Rylee: YIKES!