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Adjective: grandiose  'gran-dee,ows or ,gran-dee'ows
  1. Impressive because of unnecessary largeness or grandeur; used to show disapproval
  2. Affectedly genteel
    "It might be a bit of an arty lifestyle, but it's not a grandiose, fashionable life";
    - hifalutin, highfalutin, highfaluting, hoity-toity, la-di-da, la-de-da, lah-di-dah

See also: impressive, pretentious

Encyclopedia: Grandiose