The act of not making a purchase after working extremely hard on researching and selecting the desired product which is often essential for oneself.

The yooner will put in a high degree of research into the product and will find the best deal but end up missing out because they are not much fun.

A loose synonym to “missing out”
I found a great deal on a coffee machine. It’s being sold at a great price (20% off), I love coffee and it will pay for itself within weeks.

Hmm I won’t get it today because it might drop in price by another 50% tomorrow.

Next day: oh no, the coffee machine deal I found has expired before I could make the purchase, the price has increased 20% I yooned it.
by Ilovekpmg December 28, 2021
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In Scotland: a shortening of 'unionist'.
According to the referendum, 55% of Scots are yoons.
by Bedlamite10 May 6, 2016
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A common Korean name that basically means they are an awesome guy/girl everyone loves cause they are too awesome for anyone else to handle. They are so awesome that words cannot even begin to express the awesome. Many can't pronouce the name properly for some reason. Obviously they cannot even pronounce the awesome.
Person: So its euan.
Yoon: No its Yoon, Yoo-n
Person: Oh Yoooon
Yoon: Oh I give up
by bigturtleguy March 16, 2013
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In Scotland: a shortening of 'unionist', one who wants Scots and Englishmen to remain politically united.
According to the 2014 referendum, 55% of Scots are yoons.
by Bedlamite10 May 2, 2016
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Yoon is a really Nice person and she is super hot too. She is funny. Yoon is innocent but can be really dirty minded sometimes. Yoon and make friends easily because she got this charm
Timmy: can I date you yoon?
Yoon: no sorry I have a boyfriend

Timmy: aw man
by Timmy TURNING June 4, 2021
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a non-erect, or flaccid penis
he whipped out his yoon in front of everyone, leaving it dangling for all to see
by eric stritter October 26, 2006
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A mix of the words "you" and "don't", use by people who talk too fast for they own good.
If a girl show you her tits, yoon even gone know what to do wit'em!
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