bullmastiff

or bull-mas·tiff, bull mas·tiff

[boo l-mas-tif, -mah-stif]

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018