Mack is a fictional anthropomorphic 1980s Mack Superliner truck from the Pixar animated feature film Cars. He is voiced by John Ratzenberger, the only actor to have voiced a part in every Pixar film. A dedicated member of the Rust-eze Medicated Bumper Ointment Team, Mack pulls Lightning Mc Queen's trailer to his races.

a waterproof raincoat made of rubberized fabric

a person who is always flirting and hitting on girls

A mackintosh; -- a shortened form.