Source : Webster's Revised Unabridged Dictionary (1913)

Blindman's buff \Blind"man's buff"\ [See {Buff} a buffet.]
   A play in which one person is blindfolded, and tries to catch
   some one of the company and tell who it is.

         Surely he fancies I play at blindman's buff with him,
         for he thinks I never have my eyes open.
                                                  --Stillingfleet.

Source : WordNet®

blindman's buff
     n : a children's game in which a blindfolded player tries to
         catch and identify other players [syn: {blindman's bluff}]