"real MacKay" meaning in Scots

{
  "descendants": [
    {
      "depth": 1,
      "templates": [],
      "text": "the real McCoy"
    }
  ],
  "etymology_text": "Attested in 1856 as “A drappie o’ the real MacKay” (A drop of the real MacKay). Used as advertising slogan of G. MacKay & Co., Ltd., a whisky distiller.\nLater attested 1883, Robert Louis Stevenson:\n: For society, there isna sae muckle, but there’s myself—the auld Johnson, ye ken—he’s the real Mackay…",
  "forms": [
    {
      "form": "the real MacKay",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sco",
        "2": "noun",
        "head": "the real MacKay"
      },
      "expansion": "the real MacKay",
      "name": "head"
    }
  ],
  "lang": "Scots",
  "lang_code": "sco",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Scots entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The real McCoy, the genuine article, not an imitation."
      ],
      "id": "en-real_MacKay-sco-noun-kskhZvrK",
      "links": [
        [
          "real McCoy",
          "real McCoy"
        ],
        [
          "genuine",
          "genuine"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) The real McCoy, the genuine article, not an imitation."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌreɪl məˈkaɪ/"
    },
    {
      "ipa": "/ˌriəl məˈkaɪ/"
    }
  ],
  "word": "real MacKay"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [],
      "text": "the real McCoy"
    }
  ],
  "etymology_text": "Attested in 1856 as “A drappie o’ the real MacKay” (A drop of the real MacKay). Used as advertising slogan of G. MacKay & Co., Ltd., a whisky distiller.\nLater attested 1883, Robert Louis Stevenson:\n: For society, there isna sae muckle, but there’s myself—the auld Johnson, ye ken—he’s the real Mackay…",
  "forms": [
    {
      "form": "the real MacKay",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sco",
        "2": "noun",
        "head": "the real MacKay"
      },
      "expansion": "the real MacKay",
      "name": "head"
    }
  ],
  "lang": "Scots",
  "lang_code": "sco",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Scots entries with incorrect language header",
        "Scots idioms",
        "Scots lemmas",
        "Scots multiword terms",
        "Scots nouns",
        "Scots terms with IPA pronunciation"
      ],
      "glosses": [
        "The real McCoy, the genuine article, not an imitation."
      ],
      "links": [
        [
          "real McCoy",
          "real McCoy"
        ],
        [
          "genuine",
          "genuine"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) The real McCoy, the genuine article, not an imitation."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌreɪl məˈkaɪ/"
    },
    {
      "ipa": "/ˌriəl məˈkaɪ/"
    }
  ],
  "word": "real MacKay"
}