also see fuck buddy. Usually this is when its conveint for both parties when they are between significant partners.
joe: dude last night I went 3 rounds with my sparing partner.
by HRM SMK April 6, 2008
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The exsessice flab around a male waist

"mine's bigger" "what" my spare tire
by Anonymous September 14, 2003
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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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To feel stupid for doing something that is, in all honesty, stupid.
"I felt like a right spare dick when I dropped a tennar in the park bin and had to hoke around to get it out."
"Yes you did indeed look like a twat"
by JammyBambi March 23, 2006
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the definition of spare tyre - when the female or male uses the female or male when either are feeling down. ( for example, when the tyres flat on a vehicle, you only use it when you need to ).

or - the person uses one another when he or she only needs or wants something
by eshay1na March 30, 2011
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A person that is megaly hot and sexy in every way
omg that guy is like so spare ribs
by betren May 15, 2011
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It is a cooch thats so agape that it requires at least two very large phallic units to please her
hea bro help me plug that chckies spare cooch
by Spare cooch lover October 9, 2021
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