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Noun: blowhard  'blow,haard
Usage: N. Amer, informal
  1. A very boastful and talkative person
    "The blowhard couldn't stop talking about his alleged accomplishments";
    - bragger, braggart, boaster, line-shooter [informal], vaunter

Derived forms: blowhards

Type of: egoist, egotist, swellhead [N. Amer, informal]

Encyclopedia: Blowhard, Victoria