from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A prank performed while stopped in a car at a red-light; each passenger (including the driver) shouts "Chinese fire drill", exits the vehicle, runs at least once around it, then re-enters, taking a different seat.
- n. A silly, pointless exercise.
Perhaps from the WWI era, from the British practice of using Chinese as a slur; now used only as a festive exclamation. (Wiktionary)