Mr. Thomas is right, it's a term that the clerk uses to set a motion for a hearing date. The term comes from the old way that the clerk would organize the motion dates on "spindles." I imagine something like the link below. It is NOT the same as giving notice of the motion. Once the motion is filed and spindled for a date, notice of the motion and hearing date must be sent to the other side.
I agree with my colleagues: your son likely has a case. He should contact a personal injury lawyer right away. Don't expect a fast result though... these cases usually take months and years rather than days and weeks.