Definition of McCoy in English:

McCoy

Syllabification: Mc·Coy
Pronunciation: /məˈkoi
 
/

noun

(in phrase the real McCoy) informal
The real thing; the genuine article: the apparent fake turned out to be the real McCoy
More example sentences
  • But Japan, of all countries, is mastering the art of producing the real McCoy, though many of its whisky-lovers tend to become wobbly-legged after only two drinks.
  • Yet after running into him at a Hillary-bashing conference last April, and having him repeatedly call me a liar and ‘disgusting’ to my face, I concluded that he was actually the real McCoy.
  • You also have the real McCoy, although all the evidence I'm getting is that the real problem is former Warsaw Pact weapons.

Origin

mid 19th century: first appears as the real Mackay, in which real may be a corruption of the name of the Reay branch of the Scottish Mackay family.

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