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Someone out of a trio whom is seemingly the least relevant.
Me and my two friends were hanging out at the mall and I was the third wheel half the time.
by bitstripslang February 09, 2016
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Mar 1 Word of the Day
One who has a mania for music.
I am a melomaniac.
by Larstait November 14, 2003
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A person who hangs out with two other people. The two other people are closer to each other than the "Third Wheel". People generally feel awkward when the third wheel mentions how much it sucks to be the first wheel (They actually normally get mad).
-Did you invite Hannah?
-No, she's just the third wheel anyways
by IAmTheThirdWheel April 20, 2015
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A person who feels left out by a couple or a pair of besties.
Being the third wheel, Ramona took a nice selfie only to find that Marchello and Nicole were photobombing as they were kissing!
by JRHU July 29, 2018
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One who deters the socialization of a couple, perhaps when being invited out of pitty or through a feeling of duty. This person may be eased into the situation by being allowed to stay in an envirnment he or she has become accustomed to (perhaps a kitchen, where the third wheel can bake cookies for the couple.) The third wheel may feel uncomfortable about watching the couple canoodle on his her her sofa, but none of this is taken into consideration.
by Emu December 13, 2004
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One who Google's the words "third" and "wheel" (together) after being named such.

SEE ALSO: Forever Alone
Johnny went home and Google'd "third wheel" after being called one. He hasn't gone outside since...
by jizzinmypantsok February 14, 2013
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A person hanging out with two people (usually a couple) that are in a sence leaving him/her out. Called the third wheel because either:

-Having any odd number of wheels on an object generally messes it up.

-Third wheel on a bike makes a tricycle, something thats safe for kids be left alone with.
Well, if your bringing your girlfriend, I'll have to take my cousin with me, don't wanna be the third wheel.
by Sorasen March 23, 2006
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