| 1. | a contest in which drivers deliberately and repeatedly crash old cars into each other, on a racetrack or in an enclosed area, with the winner being the last vehicle still moving after all others have been disabled. |
| 2. | Informal. any event or circumstance having the chaotically destructive character of such a competition. |
| demolition derby n. A contest in which drivers crash old cars into each other until only one is left running. |