"magic mud" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A mixture of refractory materials used in casting metal."
      ],
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          "refractory",
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          "kind": "topical",
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          "name": "Baseball",
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      "glosses": [
        "A semi-liquid substance made of cornstarch and water, used in children's experiments."
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          "cornstarch",
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        "uncountable"
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    {
      "glosses": [
        "A substance used to treat baseballs before they are put into professional play, to provide a firmer grip and better control."
      ],
      "id": "en-magic_mud-en-noun-GBa-QyrE",
      "links": [
        [
          "baseball",
          "baseball"
        ],
        [
          "grip",
          "grip"
        ]
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        "uncountable"
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  "word": "magic mud"
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  "lang_code": "en",
  "pos": "noun",
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        "A mixture of refractory materials used in casting metal."
      ],
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          "refractory",
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        "uncountable"
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        "A semi-liquid substance made of cornstarch and water, used in children's experiments."
      ],
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        [
          "cornstarch",
          "cornstarch"
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      ],
      "tags": [
        "uncountable"
      ]
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      "glosses": [
        "A substance used to treat baseballs before they are put into professional play, to provide a firmer grip and better control."
      ],
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        [
          "baseball",
          "baseball"
        ],
        [
          "grip",
          "grip"
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      ],
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        "uncountable"
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