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

Derived forms: boasters

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

Encyclopedia: Boaster