1) A word used in Diary of a Wimpy Kid: The Last Straw (By Manny).

2) The noise when your crap hits the toilet.
1)
Manny: "Hi Ploopy!"

Greg: "WHAT DID YOU CALL ME?"

2)*Grunt* PLOOPY!
by J3553ROCKS April 15, 2009
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A word so deadly so foul so incomprehensible to think of how much damage it can do. This word since George Washington presidentship was locked away not to be known to the public. Until one day a man discovered and said it. Rumors have come up that this man was named “Greg Heffley” but he claims it was his brother instead.
Ploopy
by Thenickfebicoffical April 16, 2022
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Any person that is so into gaming that it becomes dangerous for those who enter his room
Damn, Jordan is GRINDING on Minecraft, he’s such a ploopy.
by Ploopyjordan14 August 26, 2019
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The foulest stench known to man. Often given as a name to those who suffer extreme flatulence. The smell of a Ploopy killed the dinosaurs. Often accompanied by a cloud of acidic green gas.
Wow, that's bad. It's a Ploopy
by Legen wait for it DARY March 8, 2011
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This is a incredibly offensive insult, it origins from diary of a wimpy kid. If you truly want to make sure your enemies never dare to show their face to you again, one might add the adjective poopy, to ploopy
Greg: “hey Manny.”
Manny: “Ploopy!”
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