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A mental illness that makes a person say 'fuck you' to everyone and everything all the time.
Person1: what's up man.
Person2: fuck you!
Person1: dude, you have a serious case of fuckyounism. You should see a shrink.
by NewEnglisher July 21, 2012
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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