1. Affectedly genteel; to carry an air of affected importance; to be snobbish and haughty
   "It might be a bit of an arty lifestyle, but it's not a lah-di-dah, fashionable life";
   - grandiose, hifalutin [informal], highfalutin [informal], highfaluting [informal], hoity-toity [informal], la-di-da [informal], la-de-da [informal]

See also: pretentious