skip rope

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb idiomatic To jump over a rope, both of whose ends are held by the jumper or by two others, while the rope is moved under the jumper's feet in a continual rhythm; to play the game of jump rope or exercise by jumping rope.
• noun The rope used in this activity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a length of rope (usually with handles on each end) that is swung around while someone jumps over it