brag ‧ ga ‧ do ‧ ci ‧ o /ˌbræɡəˈdəʊʃiəʊ $ -ˈdoʊʃioʊ/ BrE AmE noun [uncountable] especially literary
[ Date: 1500-1600 ; Origin: Braggadocchio proud-talking character in the poem The Faerie Queen (1590) by Edmund Spenser ]
proud talk about something that you claim to own, to have done etc