Source : Webster's Revised Unabridged Dictionary (1913)

Snobbish \Snob"bish\, a.
   Of or pertaining to a snob; characteristic of, or befitting,
   a snob; vulgarly pretentious. -- {Snob"bish*ly}, adv.

Source : WordNet®

snobbishly
     adv : in a snobbish manner; "they snobbishly excluded their less
           wealthy friends from the party" [syn: {snootily}, {uppishly}]