the genuine person or thing (esp in the phrase the real McCoy)
Word origin
C20: perhaps after Kid McCoy, professional name of Norman Selby (1873–1940), American boxer, who was called "thereal McCoy'"to distinguish him from another boxer of that name
McCoy in British English2
(məˈkɔɪ)
noun
Sir Tony, full name Anthony Peter McCoy. born 1974, Northern Irish national hunt jockey: champion jockey every season from 1995/96 to 2014/15 during which he rode a record 4348 winners