I believe you may have meant “Bullmastiff.” The Bullmastiff is a large and powerful breed of dog known for its strong and protective nature. Here’s some information about Bullmastiffs.
Bullmastiffs are solid and muscular dogs with a distinct appearance. They have a short coat that comes in colors such as fawn, red, or brindle. Their broad head, strong jaws, and well-muscled body contribute to their imposing presence.