1. an overheated bearing or axle box on a railroad car
Usage: railroad terminology
2. a small enclosed space filled with smoke, especially marijuana smoke
Usage: slang

1. to smoke marijuana in an enclosed space to concentrate the smoke
Usage: slang

Examples

• The train was delayed due to a hotbox on one of the freight cars.
• Railroad inspectors use thermal detectors to identify hotboxes before they cause derailments.
• The mechanic discovered the hotbox had damaged the wheel assembly.
• They decided to hotbox the garage while their parents were away.
• The car windows were fogged up after they hotboxed it.
• Don’t hotbox in enclosed spaces without proper ventilation.