The term CONTACT BETWEEN TWO BILLIARD BALLS can be summarized as the KISS, which stands for Kinetic Energy in a Successful Strike. This is a term used in the game of billiards to describe the transfer of energy between two balls when they collide. The amount of energy transferred depends on the speed and angle of the balls at the time of contact. This energy transfer is important for the accuracy of shots and the overall success of a game.