Top Definition
A fan-created phrase meaning to act like singer/songwriter Jason Mraz in any way. Most commonly refers to wearing hats (but can be used any way the user sees fit).
Person 1: Hey dude, isn't this hat Mrazzy?

Person 2: Gnarly! You're really Mrazzin it up!

Person 1: High five!
by Mraztastic! July 07, 2009

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