Definitions by Rokel

upslut 

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.

upslut by Rokel March 19, 2010