jumping jack
noun [ C ] (also jumping Jack) uk/ˈjʌm.pɪŋ ˌdʒæk/ us/ˈjʌm.pɪŋ ˌdʒæk/
(EXERCISE)
[ usually plural ] (UK also star jump)开合跳，跳跃运动（原地分腿跳起、两臂上举击掌后还原的动作）
a physical exercise in which you stand with your feet together and arms down, jump up and spread your arms and legs far apart and land, then jump and bring your feet together and arms down again
Do a few jumping jacks or pushups to raise your heart rate. 做几个开合跳或俯卧撑来提高你的心率。
"Spread out and let's get started," the coach says. "Jumping jacks. Go." “大家散开，我们开始吧，”教练说：“开合跳。开始。”
- More examples
- They did a lot of push-ups, sit-ups, jumping jacks, and running drills in their PE classes.
- Children often deem jumping jacks and chin-ups boring or goofy.
- James did a little dance, then, in a fit of enthusiasm, performed jumping jacks.
(TOY)
跳娃娃（一种用线牵动的儿童玩具）
a small toy in the shape of a person that can be made to jump or dance with strings or a sliding stick
Jumping Jacks have delighted children and adults for hundreds of years. 几百年来，跳娃娃一直深受儿童和成人的喜爱。
I started jumping up and down like a jumping Jack. 我像个跳娃娃一样，开始上跳下窜。
- More examples
- The jumping jack toy became known as Hampelmann in German-speaking countries.
- "Man, I feel like a jumping jack here," O'Connell said.
- We are the jumping jacks. They pull the strings and we dance.