When you're absolutely in love with a Kate and can't bear a moment without her.
This serious medical condition can only be treated with your Kate, random Kate's will not suffice, she must be yours.
Justin: Hey Nick you look awful today what's wrong?
Nick: I'm feeling extremely Katesick, I've never been in such bad shape.
Justin: Damn, I've heard the only treatment for being Katesick is a good lovingly gorgeous Kate.
by 2ndbestpilot April 25, 2019
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