Pizza Bone
A “pizza bone” is the outer edge of the pizza crust—usually without any cheese or tomato sauce. The name “pizza bone” has been cited in print since at least 1983.
Wiktionary: pizza bone
Noun
pizza bone (plural pizza bones)
(US) The thick, generally curved, end of a slice of pizza.
1998 July 29, Laurie
. But the crust (or “pizza bone” as we refer to it at my house)IS the best part of a slice of pizza!
1999 January 26, Jerry Roush
. If the dough is elastic, rolling into balls and forming into “crusts” would probably yield better results. Besides, then you can regulate the crust’s edge (aka the “pizza bone”).
2000 September 14, Kathleen
. I had a couple of slices of leftover stuffed-crust pizza for lunch. The big dogs were outside, so I gave Scully a whole pizza bone (the outer crust edge) to have all to herself.
Urban Dictionary
pizza bone
The part of the pizza that’s left over after someone’s eaten the part with all the toppings on it.
Bob didn’t like the crust, so he left all his pizza bones on his plate.
by Kate Apr 19, 2005
Urban Dictionary
pizza bones
The outer crusts of a pizza.
All that’s left in the box are the pizza bones.
by G-Mudder Oct 13, 2006
Google Books
Especially for Girls Presents Memo:
To myself when I have a teenage kid
By Carol Snyder
New York, NY: Coward-McCann
1983
Pg. 144:
Jillie calls it ‘pizza bones,” because people leave the crust on their plates.
3 February 1984, Miami (FL) Herald, “What about cat-shaped kibbles?,” pg. 11C:
For instance, we call leftover pizza crusts “pizza bones.”
30 October 1988, Dallas (TX) Morning News, “More family words from the creative home front,” pg. 1F:
pizza bones: the leftover edges of pizza slices.
Google Books
September 1990, Orange Coast Magazine (CA), pg. 126, col. 2:
A half-dozen Coors cans, dead soldiers, littered the sink counter along with grease-stained pizza boxes filled with pizza bones.
Google Books
The Perks of Being a Wallflower
By Stephen Chbosky
New York, NY: Simon and Schuster
1999
Pg. 85:
I also called pizza crust “pizza bones.”
Google Books
Meet Me in Texas
By Sandy Steen
New York, NY: Harlequin
2005
Pg. 178:
Doodles seemed to be the only one not sufficiently stuffed, having had to settle for the naked crust edges, which Allison called pizza “bones.”
11 May 2005, Elyria (OH) Chronicle-Telegram, “Drive-Thru Gourmet” by Ken Hoffman, pg. D2, col. 4:
Here’s some industry lingo: In the pizza biz, leftover crust is called “pizza bones.”