McCoy /məˈkoɪ/ noun
Learner's definition of MCCOY
the real McCoy
informal also US the McCoy
: something or someone that is real or genuine : something or someone that is not a copy or imitation本人；真品 -
Is that a fake gun, or is it the real McCoy? [=is it a real gun?]那是把假枪还是真枪？
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These diamonds look like the real McCoy, but they could be fake.这些钻石看起来像是真的，但它们有可能是假的。
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To help her play the role of a lawyer, the actress studied with the real McCoy. [=with an actual lawyer]这位女演员为演好律师角色，跟一名真正的律师一起学习。
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Maybe he's the McCoy, and maybe he's not.他有可能是本人，也有可能是假冒的。