scissor kick        
noun [ C ] uk/ˈsɪz.ə ˌkɪk/ us/ˈsɪz.ɚ ˌkɪk/
 (游泳)剪式打水
in swimming, a way of moving your straight legs quickly up and down in opposite directions, used when you are doing the crawl
  (足球术语,同 bicycole kick)
in football, a  bicycle kick