7 letters · 11 points in Scrabble
noun a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting
verb attack viciously and ferociously
verb throw a steer by seizing the horns and twisting the neck, as in a rodeo
originFrom bull + dog, in reference to bullbaiting.
Etymology from Wiktionary, CC BY-SA 3.0