a firework having a long narrow tube filled with gunpowder, folded like an accordion so that when lit it burns with small explosions causing it to jump along the ground
2.
a toy figure of a man with jointed limbs that can be moved by pulling attached strings
jumping jack in American English
1.
a child's toy consisting of a little jointed figure made to jump or dance by pulling a string or pushing an attached stick
2.
a form of exercise in which one jumps from a standing position, with the feet together and the arms at the sides, to a position in whichthe feet are apart and the hands touch overhead, and then jumps back again