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1.
to have fun.
Mom: "It's Friday night! Let's waz it up!"
by HawkieHawk December 23, 2011
 
2.
A term used by Jamie Oliver whenever he decided to improve his cooking and "waz it up".
"Ok let's add some spicy red chillies to this tomato soup just to waz it up."
by Peckerama March 22, 2008