bulldog
noun
[ ˈbʊldɒɡ ]
• 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 who assists the proctors, especially in disciplinary matters.
bulldog
verb
• wrestle (a steer) to the ground by holding its horns and twisting its neck.
• "Cal was bulldogging a mean steer"