Behind the eight ball is an idiom that means being in a difficult position, often with limited good options. The phrase comes from pool, also called billiards.
On a pool table, if the cue ball ends up trapped behind the black 8 ball, your path to the next target ball can be blocked. That makes the shot awkward or much harder to play. From that concrete image, English developed a broader figurative meaning.
Today, people use the expression when someone is at a disadvantage, already in trouble, or forced to work around a problem. For example, After missing the filing deadline, the company was behind the eight ball with regulators. In everyday speech, it can also be less dramatic: I started the semester behind the eight ball after missing the first week of class.
- Literal source: a difficult pool position
- Figurative meaning: stuck, disadvantaged, or under pressure
- Common tone: informal, but widely understood
The phrase is a good example of how a sports image can become a general way to describe trouble.