Word: Eight Ball
Part of Speech: Noun
Basic Definition: An "eight ball" is a black billiard ball that has the number 8 on it. In certain pool games, especially in the game of eight-ball, this ball is usually the last one that a player needs to sink into a pocket to win the game.
The term "eight ball" primarily refers to a specific pool ball used in billiards, and it can also describe being in a tough situation.