A code word used for marijuana. In the United States, marijuana is typically sold by 1/8ths of an ounce, or by "slices" of pizza. Pot Heads often feel this is an ideal code word because of the sheer awesomeness of both pizza and marijuana.
*Pot Head Tip: "REAL pizza" or "PIZZA pizza" (meaning the actual food kind of pizza) may also need to be used to clarify when to order delivery.
"I'm getting some super yummy pizza later! Do you want any?"
"Oh, groovy! I could totally go for a slice!"
"Come on over, y'all! It's a pizza party!"
"I really want some pizza right now..."
"Seriously?!? I think I need break for a minute!"
<laughing> "No! Not 'pizza', 'PIZZA pizza'!"
<laughing> "Ooohhhh...'PIZZA pizza'! Yeah, totally!"