expression, godan verb (-ru)
jerk one's chin; point with one's chin; nod toward
A casual gesture where you lift or thrust your chin to indicate a direction or signal someone, often used instead of pointing with a finger.
See also: 決る (しゃくる)
彼はあごをしゃくって、向こうの席を指した。
He jerked his chin toward the seat over there.
When asked by the clerk, the customer pointed with his chin and said, 'That one.'