One player is blindfolded. That player is called ";it";. The other players jossle and tease the blindfolded player, hence the name blindman';s buff. The blindfolded player has to name the person that is jossling/teasing them. If the player guesses correctly, the player that is named is blindfolded and becomes ";it";. If the player does not guess correctly, they remain blindfolded until they guess correctly.
Source: From the original site.(Submitted by: Anonymous)