thrasonical

from The Collaborative International Dictionary of English v.0.48

Thrasonical \Thra*son"ic*al\, a. [From Thrso, the name of a
   braggart soldier in Terence's "Eunuch:" cf. L. Thrasonianus.]
   Of or pertaining to Thraso; like, or becoming to, Thraso;
   bragging; boastful; vainglorious. -- {Thra*son"ic*al*ly},
   adv.
   [1913 Webster]

         Caesar's thrasonical brag of 'I came, saw, and
         overcame.'                               --Shak.
   [1913 Webster]