Tomato-saurus
Pizza of course! If z = radius of the pizza and a = the height then * radius2 * height = Pi * z * z * a = Pizza.
HER: I don't- ME: *hits buzzer* NEXT
Falafel Raptors. (sorry)
A Tyrannosaurus Wrecks. EDIT: Spelled "Tyrannosaurus" incorrectly.