"Old Horse" meaning in English

{
  "forms": [
    {
      "form": "the Old Horse",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Old Horse"
      },
      "expansion": "the Old Horse",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1851, Henry Mayhew, London Labour and the London Poor, published 1861:",
          "text": "I was sentenced to three months’ imprisonment in Bridge Street Bridewell, Blackfriars, termed by the thieves the Old Horse.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Bridewell Prison in London."
      ],
      "id": "en-Old_Horse-en-name-MHeNmAIj",
      "raw_glosses": [
        "(UK, slang, obsolete, historical) Bridewell Prison in London."
      ],
      "tags": [
        "UK",
        "historical",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "Old Horse"
}

{
  "forms": [
    {
      "form": "the Old Horse",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Old Horse"
      },
      "expansion": "the Old Horse",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English slang",
        "English terms with historical senses",
        "English terms with obsolete senses",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1851, Henry Mayhew, London Labour and the London Poor, published 1861:",
          "text": "I was sentenced to three months’ imprisonment in Bridge Street Bridewell, Blackfriars, termed by the thieves the Old Horse.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Bridewell Prison in London."
      ],
      "raw_glosses": [
        "(UK, slang, obsolete, historical) Bridewell Prison in London."
      ],
      "tags": [
        "UK",
        "historical",
        "obsolete",
        "slang"
      ]
    }
  ],
  "word": "Old Horse"
}