Mau Mau is a card game for 2 or more players that is popular in Germany, the United States, Brazil, Poland, the Netherlands and some other areas. Whoever gets rid of his/her cards first wins the game. Mau Mau belongs to the larger Crazy Eights or shedding family of card games. However Mau Mau is played with a regular deck of playing cards.
RULES
The game is played with a regular deck of playing cards. The players are dealt each a hand of cards (usually 5). The rest are placed face down as the drawing stack. At the beginning of the game the topmost card is revealed, then the players each get a turn to play cards.
One can play a card if it corresponds to the suit or value of the open card. E.g. on a 10 of spades, only other spades can be played or other 10s. If a player is not able to, they draw one card from the stack. If he can play this card, he may do so, otherwise he keeps the drawn card and passes his turn. If the drawing stack is empty, the playing stack (except for the topmost card) is shuffled and turned over to serve as new drawing stack.
Source: https://en.wikipedia.org/wiki/Mau_mau_(card_game)
SPECIAL CARDS
jack - Change a suit.
9 - Reverse direction
8 - Skip a turn
7 - The following player draws 2 cards if he/she dont play 7. If he/she does, the 3rd player must also play a 7 or draw a total of 4. If he/she plays, the 4th player must draw a 6 cards and so on.