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1.
(gif-tid, id-ee-uht) An individual in possession of very high intelligence, but lacks common sense when putting it to use.
noun
"A Swedish man who was arrested after trying to split atoms in his home kitchen said Wednesday, he was only doing it as a hobby." -Stockholm— The Associated Press, Aug. 03, 2011

The man described in the article is a classic example of a Gifted Idiot.
by Stellababe August 03, 2011