pig-jawed

Century Dictionary and Cyclopedia

1. Having the upper jaw projecting decidedly beyond the lower, as a dog.

Wiktionary

1. adj. zoology Having the upper jaw projecting beyond the lower, with the upper incisors in advance of the lower; said of dogs.

GNU Webster's 1913

1. adj. (Zoöl.) Having the upper jaw projecting beyond the lower, with the upper incisors in advance of the lower; -- said of dogs.