- A roll of fat around a person's waist
- excess fat around the waistline
- A spare tire is an additional tire (or tyre - see spelling differences) carried in a motor vehicle as a replacement for one that goes flat, a blowout, or other emergency.
- An extra tire carried in a motor vehicle for emergencies
- Abdominal obesity, colloquially known as belly fat or clinically as central obesity, is the accumulation of abdominal fat resulting in an increase in waist size. There is a strong correlation between central obesity and cardiovascular disease.