Bombastic

bom-bas-tic (bŏmăsˈtĭk)

adjective
1. Important or respectable sounding with little substance or actual meaning.
Shaggy is bombastic; his beats are fantastic, so romantic...*

Synonyms: inflated, stilted, pompous, lofty, over-filled, grandiloquent, high-flown.

* Mr. Bean can also be rather bombastic.