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1.
A state of being characterized by genuine happiness, resulting in a tremendous marathon of energy.
When Jack spends time with Zoe and Rick, she becomes so hypey that she talks rapidly and can't stop moving.
by jack be nimble December 06, 2006
 
2.
being too hype; excited over nothing
A yo you being hypey.
by JayJayJumper August 08, 2006