Flow

In pinball game play flow refers to how a player has the ability in a particular game to being able to make multiple shots, one right after the other, in a quick time frame.  This means they can make combos quickly.  Flowy games tend to get the ball back to a flipper quickly between shots often feeding inlanes so that the player can make their next shot without waiting.  The opposite to flow is usually referred to as stop and go where games are designed for the player to make a shot then wait for the ball to come back to a flipper before they can make their next shot.