jumping jack

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See also: jumping-jack

English

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Noun

jumping jack (plural jumping jacks)

  1. A physical exercise performed by jumping to a position with the legs spread wide and the hands touching overhead and then returning to a position with the feet together and the arms at the sides.
    Synonyms: side-straddle hop, star jump (UK, Commonwealth)
  2. A machine, roughly the size of a three-year-old child, the foot of which vibrates forcefully, causing it to "jump" rapidly, pounding the ground to compact it.
    Coordinate terms: tamper, tamping machine
  3. (dated) A toy figure of a person with jointed limbs that can be made to appear to dance or jump by pulling an attached string.
    Synonym: quockerwodger

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