The "ring" of fat wrapping around the mid-section, caused by lack of self-respect and being abused as a child. -used to roll oneself down hills when tired.
Hey you there, I just got a flat, can I borrow that spare tire on your waist?
by chud master August 3, 2008
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shit man i smoked most my weed all i have left is this spare tire...wanna change it? hellz yea hippy
by hippy412 March 28, 2008
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Similar to the Third Wheel, the spare tire is that fifth person you bring on a double date who has to sit by themselves.

This can be especially embarrasing if the spare tire has to pull up a chair to a booth for four.

Spare tires are usually your socially awkward homies or people you feel bad for.
I'm never hanging out with Billy again. He said we were just going to the movies with 'some friends' but I actually just got played into being the spare tire!
by TheJbros11 January 14, 2011
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Playing off the expression third wheel, fifth wheel, etc. A spare tire is a person (male or female) that you bring with you on a date. If the date falls through or you're not having fun, you rely on the spare tire to get you through the night.
Ya she was a total bitch. Good thing I brought Gabe along as my spare tire.
by Dick Breaker April 23, 2010
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Third wheeling for two couples, so one would be the fifth person (fifth wheel), hence the name spare tire.
Ricky and Jane went with John and Rachel to the movies on a double date. They invited David too. David politely declined, however, telling them that he didn't want to spend a perfectly good Friday night spare tiring.
by Whitest Black Person October 27, 2016
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Similar to a third wheel, but instead of one couple and a single person, there are two couples and a single person. The name comes from the fifth wheel in a car, or the spare tire.
It was supposed to be a double date, but Tim decided to show up, thus making himself a spare tire.
by sven_meister January 1, 2011
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A woman that you use when your old one is getting repaired or you are waiting for a new one.
Him: so i thought you and christyna were together
Me: nah man she was a spare tire.
by togbp May 1, 2011
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