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1.
Evolved from typing yup really fast, then putting a space in the wrong spot to get yupy, saying this as YOU-PEE results in the spelling of uuppii. Is used as a form of awesome often refering to a person.
Dude: Hey, uuppii.
Other Chick: Wutsup mafuckaa, thanks for saying im awesome.
by alexsoxfan December 17, 2009