The edge of the pizza, which has no
toppings, the "crust". Often left over, which most
normal people simply refer to as crust, but Victor calls "bone" as in "
pizza bones".
Mike said "Dude, don't put your crust back
in the box, there are pieces left
in there, that's gross" and Victor from then on, left his pizza bone on his plate, like
civilized people do.