Top Definition
A deliberate misspelling of genius, used ironically to describe someone or something moronic.
Wow, our President is a real jenius.
by cmonkey September 22, 2007
1 more definition
A term used for someone who did something so stupid, that it's comparable to the stupidity of not knowing how to spell "genius". Mostly only usable in internet speak, since jenius and genius sound the same.
"Perhaps staying up till four a.m. wasn't the best decisions."

"U r a jenius".
by Kyle Blah May 23, 2007

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