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When an individual, believes he is of high intelligence but in reality they are simply stupid.
A person that makes a comment that is nearly impossible to believe.
Situation 1:

"Ya man, i think i want to go into engineering!"
"You cant, you are ztubid."

Situation 2:
"Yo, i think i have elephentitis."
"You are so ZTUBID!"

by ztubidist January 25, 2009
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