a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting
"The neighbor's bulldog, with its massive head and characteristic undershot jaw, sat patiently waiting to chase the local cats."
A breed of dog developed in England by the crossing of the bullbaiting dog and the Pug to produce a ladies companion dog. Having a very smooth coat, a flattened face, wrinkly cheeks, powerful front legs and smaller hind legs.
"The new puppy has all the classic features of a bulldog, from its wrinkly cheeks and flattened face to its short, smooth coat."
attack viciously and ferociously
"The pit bull lunged at the intruder, attacking viciously and ferociously until it was subdued by the police."
throw a steer by seizing the horns and twisting the neck, as in a rodeo
"The experienced cowboy knew exactly how to bulldog the steer before it could buck him off."
To chase (a steer) on horseback and wrestle it to the ground by twisting its horns (as a rodeo performance).
"The crowd cheered as the cowboy bulldogged the steer, spinning his lasso around its horns before slamming it onto the dirt arena floor."