The word Pit Bull was first applied to the crossbreed of English Bulldogs and English Terriers. Now, the term Pitbull refers to one of the following; the American Bully, the Staffordshire Bull Terrier, the American Pitbull Terrier, and the American Staffordshire Terrier. The famous American Pit Bull Terrier is often simply called a Pitbull as well. We know it's all a bit confusing. Just remember, the term Pitbull doesn't necessarily refer to a "breed", rather a "type" of dogs.