real McCoy

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English[edit]

Wikipedia has an article on:
Wikipedia

Alternative forms[edit]

Etymology[edit]

Corruption of Scots the real MacKay, this latter attested in 1856 as “A drappie o’ the real MacKay” (A drop of the real MacKay).[1][2]

How “MacKay” became “McCoy” is unclear; first attested with this spelling in Canada in 1881. In James S. Bond's The Rise and Fall of the "Union club": or, Boy life in Canada, a character utters, "By jingo! yes; so it will be It's the 'real McCoy,' as Jim Hicks says. Nobody but a devil can find us there."[3]

The term is the subject of many folk etymologies, discussed at the Wikipedia entry.

Noun[edit]

the real McCoy

  1. (idiomatic) The genuine thing, neither a substitute nor an imitation.

Synonyms[edit]

References[edit]