In Pixar's Cars, what nickname does Mater use for himself?

Mater uses the name Tow Mater in Pixar's Cars.

Mater is Radiator Springs' rusty tow truck and one of Lightning McQueen's closest friends. His name is a pun on “tow mater,” a playful pronunciation of “tomato.” The character's informal speech and enthusiastic personality make the joke part of his identity.

Mater helps McQueen understand the town and introduces him to local activities such as tractor tipping. Although he is often comic relief, his loyalty and honesty are central to McQueen's change.

Larry the Cable Guy provides Mater's voice in the theatrical Cars films. Mater later becomes an international celebrity in Cars 2, where his accidental involvement in espionage drives much of the plot.