"mud student" meaning in English

{
  "forms": [
    {
      "form": "mud students",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mud student (plural mud students)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1865, Henry Hall Dixon, Field and Fern: Or, Scottish Flocks & Herds (South), page 188",
          "text": "This dog was bred by a “mud student” in the Coldstream or Cornhill district, and had for his sire a dog Dandie, bred by Mr. Frain of Trows.",
          "type": "quotation"
        },
        {
          "ref": "1894, Rhoda Broughton, A Beginner, page 20",
          "text": "“Is he a new mud student?”\n“He is not the cut of a mud student.”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A student of agriculture."
      ],
      "id": "en-mud_student-en-noun-9s7L8Z2O",
      "links": [
        [
          "student",
          "student"
        ],
        [
          "agriculture",
          "agriculture"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, obsolete) A student of agriculture."
      ],
      "tags": [
        "UK",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "mud student"
}

{
  "forms": [
    {
      "form": "mud students",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mud student (plural mud students)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with obsolete senses",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1865, Henry Hall Dixon, Field and Fern: Or, Scottish Flocks & Herds (South), page 188",
          "text": "This dog was bred by a “mud student” in the Coldstream or Cornhill district, and had for his sire a dog Dandie, bred by Mr. Frain of Trows.",
          "type": "quotation"
        },
        {
          "ref": "1894, Rhoda Broughton, A Beginner, page 20",
          "text": "“Is he a new mud student?”\n“He is not the cut of a mud student.”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A student of agriculture."
      ],
      "links": [
        [
          "student",
          "student"
        ],
        [
          "agriculture",
          "agriculture"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, obsolete) A student of agriculture."
      ],
      "tags": [
        "UK",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "mud student"
}