"hey, what are you doing this weekend?"
"oh, me and my girl are going out, and (insert name here) is third wheeling.
by alexa is BOMB June 22, 2007
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When you unintentionally become a third wheel with a friend and their boyfriend/girlfriend. It is unintentional because no one likes being a third wheel. For Example: A friend will invite you to hang out with him/her but will not tell you that their boyfriend/girlfriend will also be joining you, so then you get there and you are a third wheel. Usually caused by a friend not telling you that their boyfriend/girlfriend will be joining you at an event or hangout, because they are inconsiderate towards how you will feel being the third wheel.

commonly makes the person who is third wheel'd angry but they cant say anything at the time of the incident because you don't want to make a scene in front of your friend's girlfriend/boyfriend. mostly argued about with friend who third wheel'd you the next day.
Man 1: Yo, i totally got third wheel'd last night! It was so annoying.

Man 2: What does that mean?

Man 1: When Jimmy invited me to hang out at his house last night he didn't tell me that Ashley would be there too. So then i became the third wheel and had to sit there while they snuggled and made out.

Man 2: That sucks. Jimmy's a dick sometimes.

Don: James what the fuck! why did you fucking do that last night?

James: do what?

Don: you fucking third wheel'd me last night! you invite me to your house to play xbox and instead you have amanda there and i was the third wheel and it was awkward as hell!

James: oops my bad.
by Boppity November 21, 2009
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the third of 4 possible plateaus when being high on DXM
Personally, the most enjoyable plateau; but not suitable to experience if you're trying to hide it from parents.

3rd Plateau: 7.5-15 mg/kg This level has strong intoxications and hallucinations. Things can become very confusing as your thinking processes are disturbed. You can sometimes daze-off into your own world, and get lost in your own mind. Trips in this plateau can sometimes be unpleasant.
source: http://www.dextroverse.org/whatis.html#polistirex
"Dude... I'm third plateau right now... I can like... see the air particles"
by robogirl August 24, 2008
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A man with a penis that could pass for a third walking leg. It is long and full with a mind of its own.
He was short but he surely had a third leg based on the way his pants were positioned.
by fuquaystone March 11, 2018
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An additional rail usually found in subway systems, running parallel to the existing tracks, and sometimes slightly elevated. The third rail carries a live electric current which is used to power the subway trains.
by Mr. X-106 August 29, 2004
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Someone who is so afraid of being a third wheel that they leave as soon as a couple or two people start talking. Often they develop this phobia when being forced into a situation where they are a third wheel or someone's make out bitch.
person 1: Why did Lindsey just leave?

person 2: Oh she's had third wheelphobia ever since Natalie used her as her make out bitch.
by ⟢P⟣ January 16, 2010
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The third eye (also known as the inner eye) is a mystical and esoteric concept referring in part to the ajna (brow) chakra in certain Eastern and Western spiritual traditions. It is also spoken of as the gate that leads within to inner realms and spaces of higher consciousness. In New Age spirituality, the third eye may alternately symbolize a state of enlightenment or the evocation of mental images having deeply-personal spiritual or psychological significance. The third eye is often associated with visions, clairvoyance (which includes the ability to observe chakras and auras), precognition, and out-of-body experiences, and people who have allegedly developed the capacity to utilize their third eyes are sometimes known as seers.
In Hinduism and Buddhism, the third eye is a symbol of enlightenment (moksha and nirvana). In the Indian tradition, it is referred to as the gyananakashu, the eye of knowledge, which is the seat of the 'teacher inside' or antar-guru. The third eye is the ajna chakra (sixth chakra) also known as brow chakra or brow centre. This is commonly denoted in Indian and East Asian iconography with a dot, eye or mark on the forehead of deities or enlightened beings, such as Shiva, Buddha, or any number of yogis, sages and bodhisattvas. This symbol is called the "Third Eye" or "Eye of Wisdom," or, in Buddhism, the urna. In Hinduism, it is believed that the opening of Shiva's third eye causes the eventual destruction of the physical universe.
by ♫ Highway to Hell ♫ December 2, 2009
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