Y'know, I've got to ask the question to you now that we're talking about this, do you actually consider Pizza to be fast food? It reminds me of the question of "Is Iced Tea a soft drink?"
I would absolutely consider pizza fast food,If it served at chains like Domino where you pick your order at the counter and served within 30 min (fast for a pizza) . yeah I consider those Fast Food. Junk Food on the other hand a whole different story...
BUT CAN I JUST SAY
The only Dominos near us are slower and more easily bewildered than a half-dead horse with a broken leg, so it's more like snail-food whenever I order it.