A combination of a munchkin and a chump. One who always says "I will do it later". They contribute nothing to society. They are often seen lounging on a couch or bean bag with a bag of Cheetos. His goal in life is to drop out of school and smoke pot all day, although this is just a "threat" as he is too much of a pussy to actually do it. He also has his own language called "chumpkinese" which may sound similar to jibberish. Think "Don Vito"esqe.
Beware of the Chumpkins
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When a male masturbates while sitting on the toilet defecating.
This word combines the word chump with the word blumpkin.
"What is taking him so long in the bathroom?"
"He is probably giving himself a chumpkin again!"
Having somebody eat your ass while you are taking a piss.
Was at the family change room ripping a whiz, when Sweaty Rhonda give me a Big Chumpkin