Characteristic of braggadocio; involving excessive boasting, bombastic self-praise, or inflated claims about one's abilities or accomplishments.
From 'braggadocio' (vainglorious boasting, from Italian 'bravaccio') + '-ian' (adjectival suffix). The term gained popularity in English through its use in Renaissance literature.
Braggadocian swaggering is a classic villain trait in literature—it's interesting that writers realized people who brag too much are essentially revealing their own insecurity, making them both funny and contemptible.
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