Real deal.
Oilers on early trains had to be oiled to stop friction on the drive wheels. Oilers always failed... except the McCoy brand and they became known as the best and 'the real McCoy'
These appear to be the real McCoy.
by RC November 11, 2003
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In the legend of the bitter feud between the Hatfields and McCoys, a bloodline offspring of the McCoy's was the real McCoy. A child born from parents consisting of one Hatfield and one McCoy was not a real McCoy.

Therefore anything that is not genuine is not the real McCoy.
This store brand coke is not the real McCoy.
by ekks September 23, 2010
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Someone who stays online but refuses to read or answer your messages because they think they're cool.
This guy has been online for hours but hasn't replied . What a Real McCoy.
by Pizzasexymerch November 28, 2016
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During the prohibition era, many people became ill or even were killed due to poisonous home-made alcoholic mixtures known as "hooch" or "shine" (short for moonshine). A rumrunner/bootlegger named McCoy had a good three year run using a ship to import genuine alcohol to the united states, and became famous for carrying only the highest quality liquors. His cargo became referred to as the "Real McCoy", and the term became a common way of inquireing as to the authenticity of liquor products, and is commonly used today to inquire as to the authenticity of just about anything. McCoy was intercepted and arrested by the U.S. Coast Guard in 1923.
by HeliAV8R January 10, 2011
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William S. (Bill) McCoy was a bootlegger known for selling top quality liquor that was not watered down, i.e. the "real McCoy".
by Rick Bailey August 22, 2006
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1. The real deal.
2. A brand name for chips in Britain/Europe.
1. "I dont think that guys a fake.. He's the real mccoy!"
2. HEY YOU! Pass me a bag of Mccoys.
by thegreatestt October 20, 2005
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