A Pair of Sevens' is a term used in the game of blackjack to describe a hand that consists of two cards with the value of seven. This is a very strong hand in blackjack, as it gives the player a total of 14, which is a very good starting point for any hand. The term 'A Pair of Sevens' is used to describe this particular combination of two cards, and is often referred to as a 'NATURAL' or 'PAT' hand. In some cases, the player may be able to double down on this hand, depending on the rules of the game.