Bandog n. : A mastiff or other large and fierce dog, usually kept chained or tied up.

Example:
Question about a Bandog and american bulldog?

Taxonomy
Bandog, dogs, breeds, Mastiff, breeder, free encyclopedia, Bandogs, approximate average, Dog breeds, parent breeds, chain, Foundation, American Bandogge Mastiff, breed description, bloodlines, characteristics, crosses, guard dogs.

Defination from the web:
Bandog (also known as Bandogge) originated around 1250-1300 in Middle England, referring to a mastiff type dog that was bound by a chain ... The Bandog, any variety, is strictly a working breed and should be a result of serious and dedicated planning, starting from careful selection of ...