The Collaborative International Dictionary of English v.0.48:

Rodomont \Rod"o*mont\, n. [F. rodomont, It. rodomonte, fr.
   Rodomonte, Rodamonte, a boasting hero in the "Orlando
   Furioso" of Ariosto, and the "Orlando Innamorato" of Bojardo;
   properly, one who rolls away mountains; Prov. It. rodare to
   roll away (fr. L. rota a wheel) + It. monte a mountain, L.
   mons. See Rotary, Mount, n.]
   A vain or blustering boaster; a braggart; a braggadocio.
   --Sir T. Herbert.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rodomont \Rod"o*mont\, a.
   Bragging; vainly boasting.
   [1913 Webster]