spare tire

American  

noun

• spare tires
  plural

1. a tire used or kept available as an emergency replacement on a vehicle.

2. Informal. excess fat around the waistline.

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spare tire Idioms  

1. Fat around one's middle, as in He's determined to lose ten pounds and that spare tire he's acquired. This expression transfers the term for an extra tire carried in cars in case of a flat tire to excess fat around the waist. [Colloquial; mid-1900s]

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Other Word Forms

Noun Inflected Forms

• spare tires
  plural

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Etymology

Origin of spare tire

First recorded in 1920–25

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Example Sentences

See Examples For:

spare tire

Nor is there provision for a spare tire under the rear cargo floor—there’s a bunch of batteries under there.

From The Wall Street Journal ● Sep. 19, 2026

Most people would vouch for specific items, such as a spare tire or a lug wrench, if they had limited choices on what to keep in their car every day.

From MarketWatch ● Aug. 20, 2026

For Black families on Route 66, the Green Book was as essential as a spare tire.

From Los Angeles Times ● May 12, 2026

No more flatbed, which Joe conceded was mostly pointless with the bulky spare tire filling it up.

From Slate ● Jun. 22, 2025

Liam knelt beside Zu, who was holding on to the spare tire with everything she had, and went to work cranking the van up on the jack and off the demolished back right tire.

From "The Darkest Minds" by Alexandra Bracken

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