Top Definition
A day in which everyone does at least one thing that the will absolutely regret the following morning. Names for the greats Paris Hilton, Brittney spears, and Nichole Richie
guy 1: I just drank a whole bottle of rum in one going...
guy 2: arent you going to regret that?
guy 1: Probably, oh well happy Parittnole day!
by JohnnyDoubleU January 21, 2009
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