the most offencive slur in the dictionary. first found in diary of a wimpy kid: the last straw. manny creates the word and uses it against his enemies, ultimately destroying anyone is his path.
This is the word you use when your parents do something utterly stupid or make a stupid decision. Calling them stupid or retarded directly to their face would probably get you in trouble so instead call them a ploopy. This is essentially another way of calling your parent a retard.
Mom: Darling, how do you move this pointy thing on our computer screen?
Son: Mom, you move the mouse.
Mom: What's the mouse?
Son: Oh god mom, you're such a ploopy.