Top Definition
when one tries to be sluttier than the other person they are with.
Person 1: Wears heals and short shorts
Person 2: Wears heals, short shorts, low cut shirt with major boob showage.

Person 1 was just upslut-ed.

Girl don't you be upsluttin' me.
#upsluted #upsluts #slutty #bitch #out-do
by Rokel March 19, 2010
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