braggadocio (n.) Look up braggadocio at Dictionary.com
1590, coined by Spenser as the name of his personification of vainglory ("Faerie Queene," ii.3), from brag, with augmentative ending from Italian words then in vogue in English. In general use by 1594 for "an empty swaggerer;" of the talk of such persons, from 1734.