a dog of a sturdy smooth-haired breed with a large head and powerful protruding lower jaw, a flat wrinkled face, and a broad chest

(at Oxford and Cambridge Universities) an official responsible for assisting the proctors, especially in disciplinary matters

wrestle (a steer) to the ground by holding its horns and twisting its neck

Cal was bulldogging a mean steer

I bulldogged and rode broncos

cowboys compete in bulldogging and bareback riding