When the teeth of a character or characters is shown pressed together inside their own mouth in making a sad or angry expression. Like a grin but only without the smile. A grin should not be tagged clenched teeth.
This is often used in pain, anger, or even embarrassment. It can also appear through unconscious parted lips.
The following tags are aliased to this tag: gritted_teeth and gritting_teeth (learn more).
This tag implicates teeth (learn more).