General Synonyms:
* Affected
* Pompous
* Grandiose
* Ostentatious
* Showy
* Arrogant
* Smug
* Self-important
* Superficial
* Insincere
More specific synonyms:
* Snobbish: Emphasizing a sense of superiority.
* Affectedly sophisticated: Trying too hard to appear refined.
* Highfalutin: Using unnecessarily complex language.
* Overblown: Exaggerated or inflated.
* Meretricious: Flashy but ultimately lacking substance.
The best synonym will depend on the context and the specific shade of meaning you want to convey.