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1.
derived from potois (jamaican creole) to describe making good on a debt. Commonly used in dancehall music.
Rude bwoy com nice it up wid di deejay!
by The Real Ska March 09, 2009
 
2.
used as a random phrase; to make something nice; usually said when one has nothing to say or tries to be comical.
Girl: Hey! What's up?
Guy: NICE IT UP!
Girl: You retard. That wasn't funny.
by torieeeeeexx3 December 23, 2008