Crazy Eights is a game for two or more players, in which the object is to get rid of the cards in your hand onto a discard pile by matching the number or suit of the previous discard.
There is a huge number of variations of this game, and many alternative names.
It is sometimes called Crates, Switch, Swedish Rummy, Last One or Rockaway.
In Germany it is Mau-Mau; in Switzerland it is Tschausepp; in the Netherlands it is Pesten.
Some British players call it Black Jack, which is unfortunate as it can lead to confusion with the well-known American banking card game Blackjack.
The basic game of Crazy Eights uses a standard 52 card pack, or two such packs shuffled together if there are a lot of players.
The dealer deals (singly) five cards to each player (seven each if there are only two players).
The remainder of the pack is stacked face down on the table as a stock from which cards will be drawn.
The top card of the stock is turned face up and placed beside the stock to start the discard pile.
Starting with the player to dealer's left, and continuing clockwise, each player in turn must either play a legal card face up on top of the discard pile, or draw a card from the undealt stock. If an Eight is turned up by the dealer as the first card of the play pile, it is treated as though the dealer had played it.
The dealer looks at his or her hand and nominates a suit, and the first player must play a card of that suit or another Eight.
A player who has only one card left in their hand must alert the other players by saying "last card".