bombastic

Synonyms: aureate balderdash big-talking declamatory euphuistic flowery full of hot air fustian grandiose highfalutin high-flown histrionic inflated loudmouthed magniloquent orotund ostentatious overblown ranting rhapsodic rhetorical sonorous stuffed shirt swollen tumid turgid verbose windbag windy wordy

Antonyms: humble quiet reserved restrained