"dog-cheap" meaning in English

{
  "etymology_text": "From good cheap by transposition of consonants.",
  "forms": [
    {
      "form": "more dog-cheap",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most dog-cheap",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dog-cheap (comparative more dog-cheap, superlative most dog-cheap)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "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": "1861, Anthony Trollope, Framley Parsonage:",
          "text": "The horse is dog cheap, and you will have a long day for your money.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very cheap."
      ],
      "id": "en-dog-cheap-en-adj-71PPLACF",
      "links": [
        [
          "cheap",
          "cheap"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Very cheap."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "dog-cheap"
}

{
  "etymology_text": "From good cheap by transposition of consonants.",
  "forms": [
    {
      "form": "more dog-cheap",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most dog-cheap",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "dog-cheap (comparative more dog-cheap, superlative most dog-cheap)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1861, Anthony Trollope, Framley Parsonage:",
          "text": "The horse is dog cheap, and you will have a long day for your money.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Very cheap."
      ],
      "links": [
        [
          "cheap",
          "cheap"
        ]
      ],
      "raw_glosses": [
        "(obsolete) Very cheap."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "dog-cheap"
}