WordNet (r) 3.0 (2006):

snooty
    adj 1: (used colloquially) overly conceited or arrogant; "a
           snotty little scion of a degenerate family"-Laurent Le
           Sage; "they're snobs--stuck-up and uppity and
           persnickety" [syn: bigheaded, persnickety, snooty,
           snot-nosed, snotty, stuck-up, too big for one's
           breeches, uppish]

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "snooty":
   arrogant, clannish, cliquish, condescending, contemptuous,
   contumelious, disdainful, exclusive, haughty, high-hat,
   patronizing, potty, priggish, scornful, sneering, sniffy, snippy,
   snobbish, snobby, snotty, supercilious, toploftical, toplofty,
   withering