having a lower part projecting beyond the upper; "an underhung jaw"; "undershot bulldog"
Lower jaw is longer than the upper, and teeth extend past dental pad.
A condition involving inequality in the length of an animals jaws in which the lower jaw appears too long (Prognathia).
The front teeth (incisors) of the lower jaw overlapping or projecting beyond the front teeth of the upper jaw when the mouth is closed.
an underbite, opposite of overshot