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Verb; to make something, ie. the world, less screwed up.

See comedian Katie Goodman's song, I Didn't Fuck It Up.
Come on Democrats and Republicans! Let's all unfuckitup!
by An Unfucker May 20, 2011
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2
The opposite of fucked it up, to fix ones fuck up.
Obama's administration hired the people that helped fucked up Wall Street, in hopes they could "un-fuck it up".
by Want2scream November 13, 2009
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