Mr

Mr is the standard English honorific abbreviation for Mister, derived from the Old French maistre and Latin magister, meaning master or teacher. As a pet name, using the abbreviation rather than spelling it out gives it an even more deliberate, amusing quality — a formal title rendered in its most compressed form and applied to a beloved companion. It is a name given with a wink and a genuine declaration of the companion's self-important character.

Mr is a name that commits fully to the bit — shorter than Mister, somehow even more deliberate in its formality, and carrying an almost deadpan quality that suits the pet owner who has a dry sense of humor and a companion who absolutely demands to be taken seriously. Companions named Mr tend to be the ones conducting themselves with an air of authority that the rest of the household has simply learned to accept. There is deep affection underneath the formal title — calling your companion Mr is a way of saying you see exactly who they are and you find it completely wonderful.