dog·fight /ˈdɔgˌfaɪt/
  混戰,纏鬥,空戰,狗咬狗(vi.)在空中纏鬥
  dogfight
       n 1: a fiercly disputed contest; "their rancor dated from a
            political dogfight between them"; "a real dogfight for
            third place"; "a prolonged dogfight over their rival
            bids for the contract"
       2: an aerial engagement between fighter planes
       3: a violent fight between dogs (sometimes organized illegally
          for entertainment and gambling)
       v 1: arrange for an illegal dogfight
       2: engage in an aerial battle with another fighter plane