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Along the lines of kthxbye. A quick and rude denial/rejection of whatever was asked or offered.
Guy: hey what r u doin 2nite? wanna watch LOTR ROTK?
Girl: umno
by B March 31, 2005
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When you say "no" with attitude or sass
Girl/Boy I don't like:Can I copy the 12 page homework
Me:um no
via giphy
by k_19@rosebud September 23, 2018
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