#flutter_kick__flutterkick  a swimming kick; the legs are moved rapidly up and down without bending the knees
  supertype:  swimming_kick  a movement of the legs in swimming
  part of:  Australian_crawl__crawl__front_crawl__frontcrawl  a swimming stroke; arms are moved alternately overhead accompanied by a flutter kick
  part of:  backstroke  a swimming stroke that resembles the crawl except the swimmer lies on his or her back

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