n. | 1. a powerful dog of a breed that is naturally fierce and aggressive, or is trained to be so 2. an aggressive, often unscrupulous partisan used by a politician or political party to denigrate an opponent or opposing party 3. an aggressive proponent, mouthpiece, or supporter of a politician or political party 4. a dog that is trained to protect property and attack people who try to come in 1. a powerful dog of a breed that is naturally fierce and aggressive, or is trained to be so 2. an aggressive, often unscrupulous partisan used by a politician or political party to denigrate an opponent or opposing party 3. an aggressive proponent, mouthpiece, or supporter of a politician or political party 4. a dog that is trained to protect property and attack people who try to come in |