WordWeb Online

1. (used colloquially) overly conceited or arrogant
   "they're snobs--stuck-up and uppity and bigheaded";
   - persnickety, snooty [informal], snot-nosed [informal], snotty [informal], stuck-up [informal], too big for one's breeches [informal], uppish [informal], snobbish

See also: proud, toffee-nosed [Brit, informal]