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2 definitions by Kelly Lenigan

 
1.
It means bed/sleep/hit the hay/nap/Zzz, etc (you get the idea).
I'm gonna go to nee-naw now.
by Kelly Lenigan July 16, 2008
 
2.
A weird looking new pokemon that looks like a pikachu except covered in zits or spots and all that stuff (maybe even STD's) resembling a slice of pizza.

OR...

A Pikachu that loves pizza
Ash Ketchum: "Oh wow what's this?"
Professor Oak: "It looks like a new pokemon"
"PIZZACHUUUUUU!"

OR

Ash Ketchum: "I thought pokemon liked pokeblocks"
Professor Oak: "Apparently this one is different. It likes human food."
Pokemon: "Pizzachu?"
by Kelly Lenigan March 06, 2008