Blind man's bluff or Blind man's buff is a children's game played in a spacious area, such as outdoors or in a large room, in which one player, designated as "It," is blindfolded and gropes around attempting to touch the other players without being able to see them, while the other players scatter and try to avoid the person who is "it", hiding in plain sight and sometimes teasing them to make them change direction. The game is a variant of tag.
There are several versions of the game:
A children's game similar to blind man's bluff is Marco Polo, with the main difference being that Marco Polo is played in a swimming pool and the one that is "it" calls out "Marco" to which the other players must reply "Polo." Thus indicating their position and making it easier for the person who is It to go in the right direction.
The game is known as blind man's buff in the UK and Ireland, "buff" meaning a small push. It is possible that the American name is a corruption, or it may originate from the older sense of bluff meaning to blindfold .
Blind man's bluff should be played in an area free of dangerous obstructions so that the It player will not suffer injury from tripping over or hitting something.