1Play a card that matches the top card's suit or rank.
2Eights are wild: play one any time and name the next suit.
3If you can't play, draw from the stock.
4The first to empty their hand wins.
Questions
Be the first player to discard all cards from your hand. The first player to play all their cards wins the round. For scoring, remaining players' hands count against them (8s = 50, face cards = 10, others = face value). Play to a target score (often 100 or 500).
Use a standard 52-card deck (add a second deck for 5+ players). Deal 5 cards to each player (7 cards for 2 players). Place the remaining deck face-down as a draw pile. Flip the top card to start the discard pile.
Save your 8s for when you really need them - they're your best cards. Watch what suits other players seem to be collecting or avoiding. If you're stuck drawing many cards, play something undesirable to opponents.
Mau Mau: European variant with different special cards. Some versions have additional special cards (2s make next player draw, etc.).