1 of a lower jaw : projecting beyond the upper jaw : undershot. 2 : having an underhung jaw this poor creature, heavy-bodied, bowlegged and underhung— J. A. Thomson.

What is a undershot?

Medical Definition of undershot

: having the lower incisor teeth or lower jaw projecting beyond the upper when the mouth is closed —used chiefly of animals.

What does the originally mean?

1 archaic : by origin or derivation : inherently. 2 : in the beginning : in the first place : initially. 3 : in a fresh or original manner.