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Worldwide, Mouser (モーサ , Mouser , Маусер ) is a very rare masculine given name. The first name Mouser is characteristic of Brazil, where it is an extremely rare boy's name, and India. Much more frequently, Mouser is the last name as well as the forename.
Mouser is also a name for the fictitious and mythical characters: Mouser , the fictional type of robot in the Teenage Mutant Ninja Turtles franchise.