Top Definition
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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A sweatshirt which lacks a hood. (non zip up)
She looked disgusting while wearing that old shumpy.
by Shumpy876345 September 25, 2009

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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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