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1 definition by Rachel Retardation

Any given Friday when people choose to run around slapping anyone and everyone's asses. Usually, a male slaps a female's ass, and it's automatically considered okay for no reason other than the boy has proclaimed it "Slapass Friday."
BOY: *slaps girl's ass*
GIRL: What was that for, you prick?
BOY: Slapass Friday!
by Rachel Retardation December 01, 2006