https://www.allhorsebreeds.info/56/ovrshot-jaw/
Overshot jaw (parrot mouth) or undershot jaw ("monkey jaw" or "sow mouth") - All Horse Breeds
Aug 18, 2017 - An overshot jaw is when the upper jaw extends further out than the lower jaw, with the horse having an overbite (also called a parrot mouth). When the lower...
parrot mouthhorse breedsovershotjawundershot