TMJ noun2 •(US, informal) Temporomandibular pain, temporomandibular joint disorder.She was an only child, a gym rat, had a blotchy red birthmark on her neck in the shape of Florida, a gum-chewing habit that gave her TMJ and breath that reeked of cinnamon and green apple candy. — 2018 •Abbreviation of temporomandibular joint. formsTMJs
