dogfight (n.)youdaoicibaDictYouDict[dogfight 词源字典]
"aerial combat," World War I air forces slang, from earlier meaning "riotous brawl" (1880s); from dog (n.) + fight (n.). The literal sense of "a fight among or between dogs" is from 1650s.[dogfight etymology, dogfight origin, 英语词源]