What is "schlafmutze"

' Schlafmütze' is a fast-paced game of matching and bluffing, which is closely related to the English game spoons (or pig and tongue). The game requires a minimum of two players, but ideally a minimum of three players, and involves each player passing round cards in an attempt to acquire a hand consisting of all the same value cards (e.g. four 7s if the players each have four cards, or 3 Queens if the players each have three cards). This does therefore require that at least one player begins with one more card than the rest present (sometimes when the group is larger, more than one player may begin with more cards to make game progress more swiftly).