jumping jack
noun/ˈdʒʌmpɪŋ dʒæk/
/ˈdʒʌmpɪŋ dʒæk/
[usually plural] (North American English)- an exercise in which you stand with your legs together and your arms at your sides and jump to a position with your legs apart and your arms spread out
- I leapt to my feet and executed a series of jumping jacks.
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jumping jack