My Dad used nagivator to describe my Mom sitting in the passenger seat, whether or not she was giving directions. It's become a sort of sly but endearing insult in our family.

And beautimous is the superlative form of beautiful, of course. It's the shortened and Anglicized form of the Latin expression "beautimus maximus," which is still heard occasionally in our household to express supreme and unequalled beauty. E.g., "Crystal, the pretty girl cat, is beautimus maximus after her bath!"