"Protruding jaw" refers to when the lower part of a person's face sticks out further than usual, making their chin and lower teeth more prominent or noticeable. Full definition
Also, be on the lookout for phrases or even names that elicit a negative or disengaged response — leaning back, narrowing of the eyelids, crinkling of the nose or a protruding jaw. (entrepreneur.com)
With long, messy, jet - black hair, a protruding jaw, and a face seemingly shaped from industrial - strength putty, Wiseau resembles an amusement park caricature. (theringer.com)
Mimics loved his protruding jaw and curious speech patterns. (screenandstream.com)