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One who has long hair and likes to party a lot.
Known to chase girls.
Wearer of Hawaiian shirts and shorts.
Besides being a pronoun, it can be used as an adverb or adjective.

i.e. "I got so shump-ed up last night, you should have seen me."
<sing> "Shump around, Shump around, get up get down, Shump around."
by Bert February 19, 2004
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enthusiastically pessimistic
Usually is used when someone is very willing to do something, and is very sure that the result will be abysmal.

Bill: "Hey, do you want to go with me to the beach? I'm going to try to learn to surf."

Hank: "Hell yeah I do! I'm sure you'll fail miserably, this will be awesome to watch!"

Bill: "Dude, why must you be so shumpy?"
by Vikks July 07, 2010
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Shumpy is a creature that lives on her couch and wakes up at 3:00pm every day. Shumpy binge watches a lot of anime. She wishes Rin okumura was real. Shelby has amazing friends.
churub: "hey shumpy"
Churub:"come look at this edgey add meme"
by Salty_llama August 01, 2017
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A form of grumpiness that occurs in the morning before one's first shit.
Don't go near Russ the Muss this morning. He's a bit shumpy.
by SniffablePurse July 23, 2006
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