More importantly, how do you order pizza?
Assuming you are a anthropomorphic hero in 1980s NYC calling from a payphone, this is typically SDC (Short Duration Calls). However, if your hero has one of those giant brick cell phones of the era (automatic for human sidekick characters with the 'yuppie' quality), then it would be MDC (Mobile Data Communications). However, these only applied if you were in the same area code. If you were in the 212 and the pizza joint was in the 718, then you had to apply megaPhoneNumber (one would assume that the converse is also true, but it isn't actually covered in the written rules).
Ordering requires a skill check, any of Business & Finance, Disguise, Impersonation, Streetwise, and Hand to Mouth: Basic will work. The order-taker at the pizza place has 'active confusions' similar to active defenses. It states that if their defense 'exceeds your skill check' they get your order wrong, which seems to be an error since your skill check is percentile (roll low) and their defense is d20 (roll high). Note that deliberately ordering 'Deep Dish' or 'Chicago Style' will send your order taker into 'shell shock' -- the only place this quality is mentioned in the game and unrelated to turtle shells.
Once your order is taken, you enter a mini game to create your pizza driver (only skills up through 'Highschool Level Education' need to be generated) and the vehicle they are driving (see appendix for stats on 1975 AMC Gremlin). In addition to structural and armor SDC and MDC, they also have delivery SDC and MDC which are separate tracks. These numbers start out the same as the structural SDC/MDC, but are tracked separately in case your pizza delivery gets involved in combat and you need to determine if their car explodes but they still manage to get you your pizza in 30 minutes or less.
Pizza can be used as an improvised weapon. Treat as a sai with a -5 to-hit which does 1/10 normal damage, but does invoke a roll on the grease-stain chart. Pizza cut into squares can be thrown as shuriken, but you need to succeed on your order roll by 50% or more to convince a NY pizzeria to do so. Frozen pizza is stated to exist, but is hinted to have been part of a supplement which never materialized.
Pineapple pizza is covered in the mutagen rules next to green ooze under a bioterrorism sidebar. Anchovies are a playable Animal-Mutant Species.
None of the above is remotely true, but much of it is completely on-brand for the game.