jump rope

Short definition from Wiktionary

Noun

1. 1
   (also jump-roping, jumping rope) The activity, game or exercise in which a person must jump, bounce or skip repeatedly while a length of rope is swung over and under, both ends held in the hands of the jumper, or alternately, held by two other participants.
2. 2
   The length of rope, sometimes with handles, casing or other additions, used in that activity.
3. 3
   A single jump in this game or activity, counted as a measure of achievement.
4. 4
   Alternative spelling of jump rope.

Verb

1. 1
   To repeatedly jump over a rope, the ends of which are held by the jumper or by two others, while the rope is swung under the feet and over the head of the jumper; to play the game of jump rope; to exercise by jumping rope.