In Texas hold’em, if one player begins the hand with a wired pair and his lone opponent holds two overcards both larger than that pair, this is said to be a coin flip. Before the flop each player has about a 50/50 shot at winning the hand. Something like 9-9 versus A-K would be a very common coin flip scenario. But if the pocket pair is deuces then any two unpaired cards—provided that one of the two cards is not a deuce—in the opponent’s hand would produce the same result.