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1) refusing something rational
2) refusing all things rational
3) unreasonable, not reasonable
4) refusing logic, illogical
5) unwilling to see the perfectoin of my logic and desperately clinging to quaint notions or antiquated superstitions that are nullified by the enfoulabilidy of my vastly superior position, absolutely infallible perfection
"You continue to disagree with me, despite having heard all the facts of the matter, which indicates you are either daft or irrational."
by kplugrafa September 10, 2009
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Dec 1 Word of the Day
"Man fuck Donald trump, he wants to build a wall and don't pay taxes!!"
by January 30, 2017
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The belief of Mets fans that they will ever win a game
"Yo dude, how are the Mets gonna do this season?"
"World series in six! You can't beat a core offense with Wright, Reyes, Beltran, and Bay!"

(Five months later, 17 games back in the NL East, irrational hope still exists)
by yagottabelieve April 17, 2010
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Something that is not used and/or is hindering.
Something that has no rational purpose.
i.e Buying the mug was irrational as he never used it.
by 0110001101100100 October 17, 2019
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