The term PINBALL FAIL is composed of two words, the first being 'PINBALL' and the second being 'TILT', which is a four letter word. PINBALL is a type of arcade game in which players use flippers to control metal balls on a sloped board. The objective is to score points by hitting targets with the ball. When a player fails to hit a target, they can cause the machine to TILT, which is the second word in the term PINBALL FAIL. This causes the game to end and the player to lose their turn.