Definition from Wiktionary, the free dictionary
- spare tyre (UK)
- (North America) An extra wheel or tire carried as a replacement in case of a flat.
- (North America, idiomatic) Excess weight or fat accumulated near the waist.
- Spare tire is generally a misnomer, as almost all vehicles actually carry an entire wheel with a tire mounted on it as a spare.
extra tire — see spare tyre
fat around midsection — see spare tyre