The Collaborative International Dictionary of English v.0.48:
Snobbish \Snob"bish\, a. Of or pertaining to a snob; characteristic of, or befitting, a snob; vulgarly pretentious. -- Snob"bish*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
snobbishly adv 1: in a snobbish manner; "they snobbishly excluded their less wealthy friends from the party" [syn: snobbishly, snootily, uppishly]