Ever had to use a toilet at a not so clean rest stop. You don't wanna sit down and with the added elevation above the water you dread the caca water splash from the poop plop. Just lay down ample sheets of toilet paper on the surface the water to break the fall. That's a plopper stopper.
"Hey bro, that toilet was nasty. I put down a plopper stopper for sure."
"If you're going to use that restroom, I'd put down a plopper stopper."
A Crumple Plopper is a plopper who dumps irregular and crumpled plops. These plops emerge slowly and painfully at first but then as the pressure builds they are finally boshed into the world with great force and gusto. Staining the pan's sides and spreading their foul and odorous miasma they eventually engulf their victims much like a big Welsh girl's knicker gusset.
My, my, is that an irregular and misshapen plop Sir Blundell Huge-Blundell? It looks to me as if you have been guzzling a gigantic curried gruffalo to produce such a Crumple Plopper.