puffed up with vanity; "a grandiloquent and boastful manner"; "overblown oratory"; "a pompous speech"; "pseudo-scientific gobbledygook and pontifical hooey"- Newsweek

Bombastic, pretentious, or excessive; as, overblown rhetoric.

Bloated. Excessively fat and rich.

A term applied to Bessemer steel which has been blown too long and is overoxidized and hence inclined to be wild.

Having been given more publicity than warranted; having had ascribed more importance than was justified; as, an overblown medical discovery.

past the stage of full bloom; "overblown roses"