The term "scratch" is often heard around a game of pocket
billiards (or
pool) to represent a foul in which:
1. The cue ball is pocketed
2. The cue ball is popped off-table
3. The cue ball (or object ball) fails to touch a rail after contacting another ball
It was almost the perfect break -- he sank the 8 on
the snap, but still lost due to the pocket scratch.