Any of a breed of small dogs originating in New England as a cross between a bull terrier and a bulldog and having a smooth, brindled or black coat with white markings. Also called Boston bull波士顿狗：一种原产于新英格兰的小狗，是牛头㹴和牛头犬的杂交品种，具有光滑的、有斑纹的或黑色的带白斑的皮毛 也作 Boston bull