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Main Pot
• The center pot. When a player goes all-in, side pots are created for the remaining players to bet into.

Maniac
• A very aggressive player who plays a lot of hands.

Middle Pair
• In flop games, when a player makes a pair with one of his/her down cards and the middle value card on the flop.

Middle Position
• Somewhere between the early and late positions on a round of betting (one a ten person table, the fifth, sixth and seventh seats to the left of the button).

Miscall
• An incorrect verbal declaration of the ranking of a hand.

Misdeal
• A mistake on the dealing of a hand which causes the cards to be reshuffled and a new hand to be dealt.

Missed Blind
• A required bet that is not posted when it is your turn to do so.

Monster
• A very big hand.

Muck
• To fold. The pile of discards is also called the muck.