Definition of "bulldog"

bulldog

/ˈbʊl.dɒɡ/

noun
plural bulldogs
1. 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.
  1. The original form of this breed, the British bulldog.
2. A stubborn or determined person.
3. A refractory material used as a furnace lining, obtained by calcining the cinder or slag from the puddling furnace of a rolling mill.
4. (UK, Oxford University slang) One of the proctors' officers.
5. (professional wrestling) Any move in which the wrestler grabs an opponent's head and jumps forward, so that the wrestler lands, often in a sitting position, and drives the opponent's face into the mat.
6. (US, publishing) A bulldog edition.
  Quotations
  The bulldog's just gone to press.
  1940, Citizen Kane (film)
7. Any of various species of African freshwater fish in the genus Marcusenius, a type of elephantfish.
verb
third-person singular simple present bulldogs, present participle bulldogging, simple past and past participle bulldogged
1. (intransitive, often with into or through) To force oneself (in a particular direction).
  Quotations
  So to give you some idea, we had scenarios where Yamato came steaming over the horizon and just bulldogged its way straight through the American battleline, and the whole thing was done and dusted inside of an hour, with 18-inch shells just blowing apart anything in sight.
  2019 March 6, Drachinifel, 14:01 from the start, in The Battle of Samar (Alternate History) - Bring on the Battleships!‎, archived from the original on 20 July 2022
2. (transitive) To chase (a steer) on horseback and wrestle it to the ground by twisting its horns (as a rodeo performance).