tub
n.— «Tagliani wasn’t hurt in the wreck, which happened in the warm-up for yesterday’s Molson Grand Prix of Toronto.…His team’s spare car—a “tub” as it’s known in the parlance—amounted to an empty shell. It was lacking vital components such as a brake pedal and seatbelts and, um, an engine.» —“Crew salvages parts for last-minute ride” by Dave Feschuk Toronto Star (Canada) July 10, 2006. (source: Double-Tongued Dictionary)