Definition of jump-starts:
(v) :
(intransitive) To propel oneself rapidly upward, downward and/or in any horizontal direction such that momentum causes the body to become airborne.
(v) :
(intransitive) To cause oneself to leave an elevated location and fall downward.
(v) :
(transitive) To pass by means of a spring or leap; to overleap.
(v) :
(intransitive) To employ a parachute to leave an aircraft or elevated location.
(v) :
(intransitive) To react to a sudden, often unexpected, stimulus (such as a sharp prick or a loud sound) by jerking the body violently.
(v) :
(intransitive, figuratively) To increase sharply, to rise, to shoot up.