A Cleveland Piledriver is the combination of a Cleveland Steamer and a regular piledriver. To put it simply, you take a shit on the ground, and then piledrive your bitch promptly into your pile of dooder.
Also synonymous with the "poop smash"
Examples :
"I made Jill tap out with a massive a Cleveland Piledriver last night."
"I knocked Jill out cold last night with my Cleveland Piledriver, it was creamy."
"I Cleveland Piledrived. Nice."