one of an English breed of medium-sized, short-haired, muscular dogs with prominent, undershot jaws, usually having a white and tan or brindled coat, raised originally for bullbaiting.
2.
Informal. a stubbornly persistent person.
3.
a short-barreled revolver of large caliber.
4.
Metallurgy. slag from a puddling furnace.
5.
an assistant to the proctor at Oxford and Cambridge universities.
adjective
6.
like or characteristic of a bulldog or of a bulldog's jaws:
bulldog obstinacy.
verb (used with object), bulldogged, bulldogging.
7.
to attack in the manner of a bulldog.
8.
Western U.S. to throw (a calf, steer, etc.) to the ground by seizing the horns and twisting the head.