Top definition
A person inhabiting the qualities of someone who is not mentally sound or is bordering on insanity. Otherwise referred to as a place where mentally delusional people reside.
She's over there talking to herself again; that girl is 100% Kookastan.

If he thinks she's going to go out with him, he must be living in Kookastan.
by elk1279 July 09, 2009
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