bull mastiff in British English
or bullmastiff (ˌbʊlˈmæstɪf)
noun
a large powerful breed of dog with a short usually fawn or brindle coat, developed by crossing the bulldog with the mastiff
bull mastiff in American English
a very strong, active breed of dog produced by crossing mastiffs and bulldogs
Image ofbull mastiff
© Erik Lam, shutterstock