Unless you’ve worked in a pizzeria, your pizza vocabulary is probably limited. But the crust-loving pros who are cooking up your favorite slices seem to have insider slang for everything, including whimsical terms for toppings and one-of-a-kind ways of describing regional pie styles. So if you’re looking up your pizza-talk game with words that go beyond ‘za, here’s a quick list of 15 terms you should know.

1. Tip sag

The dreaded tip sag is what you get when the pointy end of your pizza starts to droop. This most often occurs with top-heavy (and topping-heavy) pies, like Neapolitan-style pizzas with generous helpings of fresh mozzarella piled on top.

2. Avalanche

An avalanche is what occurs when all the toppings slide off your pizza as soon as you pick it up. This tends to happen when a pizza is still piping hot from the oven, so be smart and give it a minute to cool down.

3. Apizza

If you ever travel to New Haven, Connecticut, you might hear the locals order apizza (pronounced uh-BEETS). This refers to the local style of thin-crust pizza, which originated at the famous Frank Pepe Pizzeria Napoletana and has since become the area's pizza standard.

4. Grandma pie

This style of pizza is thick like a Sicilian pie, but with a thinner, denser crust. Although it likely originated in Long Island, you can now find it in pizzerias throughout New York City (and beyond).

5. Party-cut

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Also known as a tavern-cut, a party-cut describes any circular pizza that’s cut into a grid. The portions are smaller and typically square, which helps ensure that everyone at your Super Bowl party will get a piece of the pie.

6. All-dressed pizza

Order an all-dressed pizza in Montreal and you’ll get a deluxe pie with mushrooms, green peppers, and pepperoni on it. In Québec, it's known as a pizza tout garnie.

7. Flyers

Slices of pepperoni pizza are called flyers, reportedly because of the way they’re often tossed around like Frisbees.

8. Guppies

Depending on your perspective, guppies is either a really cute or really gross way to describe anchovies. Other slang words for the fishy topping include chovies, carp, penguin food, and smellies.

9. Alpo

It’s not very appetizing, but crumbled sausage does kind of resemble dog food—hence the Alpo moniker. Other nicknames for the topping include Kibbles ‘n Bits and Puppy Chow, neither of which make the topping sound any more appetizing.

10. Screamers

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Mushrooms are sometimes called screamers because of the high-pitched squeal the canned variety lets out when they’re tossed onto a hot surface.

11. Edgar Allan

What does a pizza with pepperoni and onions spell out? A PO pie—which is close enough in spelling to Edgar Allan Poe's last name that it gets tossed around in pizza kitchens on occasion. Sure, P-O or Po would be easier (and quicker) to say, but it’s not nearly as fun.

12. Blood pie

Also known as a hemorrhage, this gruesome term refers to a pizza with extra tomato sauce on it. Now please forget that we ever told you that.

13. Coastline

The coastline is that little bit of exposed sauce you can see between the sauce and the crust.

14. Mutz

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Mutz is simply a quicker way of saying mozzarella. Likewise, wet mutz is fresh mozzarella.

15. Roadie

When you get a slice of pizza to-go, that’s a roadie. Enjoy it while it's still hot (but not so hot as to cause an avalanche)!