rodomontade
Vain boasting; a rant; pretentious behaviour.
countable, uncountable
[…] the Gasconads of France, Rodomontads of Spain, Fanfaronads of Italy, and Bragadochio brags of all other countries, could no more astonish his invincible heart, then would the cheeping of a mouse a bear robbed of her whelps.
Where it comes from
From French rodomontade, a reference to Rodomonte, a boastful character in the Italian Renaissance epic poems Orlando innamorato (1483) and its sequel Orlando furioso (1506–1532). Doublet of rodomontado.
Adapted from the Wiktionary entry rodomontade (CC BY-SA 4.0).