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."
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."