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To remove from existance, to make not exist anymore, to completely defeat. a word, that when said, ends the coversation.
matt hey sam, you have weird hair.
sam de-exist!
by Andr3w wuds. February 06, 2010
The absence of existence or that which does not permit existence.
Journalistic integrity deexists.
by KrazyC October 04, 2007