bullmastiff

or bull-mas·tiff, bull mas·tiff

[ boo l-mas-tif, -mah-stif ]
/ ˈbʊlˈmæs tɪf, -ˈmɑ stɪf /

noun

one of an English breed of dogs having a short, fawn or brindled coat, produced by crossing the bulldog and the mastiff.

Origin of bullmastiff

First recorded in 1870–75; bull(dog) + mastiff

British Dictionary definitions for bull mastiff

bull mastiff

noun

a large powerful breed of dog with a short usually fawn or brindle coat, developed by crossing the bulldog with the mastiff