Stands for 'Play in an oven', used to insult noobs on WoW.
Can be used like DIAF.

"All your base are belong to us!!!"
"Assholes, go P.I.A.O"
by Holly. F May 24, 2008
Top Definition
Is fun to be around and knows how to make a person happy. The nicest person you will ever meet. Is as pure and innocent as can get.
by Ronald Q February 06, 2009
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