[boo
l-dawg, -dog] 
noun, adjective, verb, -dogged, -dog⋅ging.| 1. | 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. |
| 6. | like or characteristic of a bulldog or of a bulldog's jaws: bulldog obstinacy. |
| 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. |
| bull·dog (bŏŏl'dôg', -dŏg') n.
tr.v. bull·dogged, bull·dog·ging, bull·dogs Western U.S. To throw (a calf or steer) by seizing its horns and twisting its neck until the animal falls. bull'dog'ger n. |