Source : Webster's Revised Unabridged Dictionary (1913)

Snide \Snide\, a.
   Tricky; deceptive; contemptible; as, a snide lawyer; snide
   goods. [Slang]

Source : WordNet®

snide
     adj : expressive of contempt; "curled his lip in a supercilious
           smile"; "spoke in a sneering jeering manner"; "makes
           many a sharp comparison but never a mean or snide one"
           [syn: {supercilious}, {sneering}]