常见于习语the real McCoy,真货,真品。词源不详,通常认为是来自苏格兰语the real Mackay,来自苏格兰Glasgow的威干忌公司A.and M.Mackay,据说是来自打假广告词It’s the real McCoy.该姓氏字面意思为Son of Kay.
"By jingo! yes; so it will be. It's the 'real McCoy,' as Jim Hicks says. Nobody but a devil can find us there." [James S. Bond, "The Rise and Fall of the Union Club," Yorkville, Canada, 1881]
来自《现代英汉综合大词典》
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