Top Definition
when your'e like super happy (Deena, Jersey Shore)
Deena: I was like so hystatic (to see Sammi Sweatheart) that I was gonna cry.
by ShaqFils32 March 05, 2011
1 more definition
To be hystatic means to be so overjoyed, that you have now become a combination of the words hysterical and ecstatic. When the Jersey Shore producers asked Deena to define it, she replies: "Hystatic is, you know, when you're like super happy, and like, really happy."
(After Sammy returns to the Shore...)

"I like, was so hystatic that I almost cried."
-Deena (From Jersey Shore)
by 561blonde March 04, 2011

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