Top Definition
A particular day when you just don't care about what anybody thinks. It really should be a national holiday.
some a-hole:"Hey, Heather! Your hair looks like crap!"
Me:"Hey a-hole! Do you know what day it is? It's Kiss My Ass Day, so kiss my ass, why don't ya?"
by Heather Nicole September 23, 2007
5 Words related to Kiss My Ass Day

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