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Noun: big gun  big gún
Usage: informal
  1. An important influential person
    "he thinks he's a big gun";
    - big shot [informal], big wheel [N. Amer, informal], big cheese [informal], big deal [informal], big enchilada [informal], big fish [informal], head honcho [N. Amer, informal]

Derived forms: big guns

Type of: important person, influential person, personage