"pavement special" meaning in English

{
  "forms": [
    {
      "form": "pavement specials",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pavement special (plural pavement specials)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2001, Raymond Coppinger, Lorna Coppinger, Dogs, page 69",
          "text": "When I ask about these dogs, they are described to me as the local mutts, mongrels, pavement specials, crossbreeds.",
          "type": "quotation"
        },
        {
          "ref": "2011, Eckart Schumann, Patterns of Change, page 29",
          "text": "Two smaller pavement specials ranged alongside, and made up for size by their barking.",
          "type": "quotation"
        },
        {
          "ref": "2013, Resh Ramlakan, Fur Kids, page 11",
          "text": "In Park Rynie, down the south coast in Kwa Zulu Natal, where I had grown up, we only saw and heard of people keeping Alsatians, Rottweilers, Labradors, poodles, and the common pavement specials. My knowledge of dogs was actually pathetic, but the subject had never interested me.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A dog of miscellaneous ancestry; a mutt."
      ],
      "id": "en-pavement_special-en-noun-Q4L4FSJk",
      "links": [
        [
          "dog",
          "dog"
        ],
        [
          "miscellaneous",
          "miscellaneous"
        ],
        [
          "ancestry",
          "ancestry"
        ],
        [
          "mutt",
          "mutt"
        ]
      ],
      "raw_glosses": [
        "(slang) A dog of miscellaneous ancestry; a mutt."
      ],
      "synonyms": [
        {
          "word": "Heinz 57"
        }
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "pavement special"
}

{
  "forms": [
    {
      "form": "pavement specials",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pavement special (plural pavement specials)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2001, Raymond Coppinger, Lorna Coppinger, Dogs, page 69",
          "text": "When I ask about these dogs, they are described to me as the local mutts, mongrels, pavement specials, crossbreeds.",
          "type": "quotation"
        },
        {
          "ref": "2011, Eckart Schumann, Patterns of Change, page 29",
          "text": "Two smaller pavement specials ranged alongside, and made up for size by their barking.",
          "type": "quotation"
        },
        {
          "ref": "2013, Resh Ramlakan, Fur Kids, page 11",
          "text": "In Park Rynie, down the south coast in Kwa Zulu Natal, where I had grown up, we only saw and heard of people keeping Alsatians, Rottweilers, Labradors, poodles, and the common pavement specials. My knowledge of dogs was actually pathetic, but the subject had never interested me.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A dog of miscellaneous ancestry; a mutt."
      ],
      "links": [
        [
          "dog",
          "dog"
        ],
        [
          "miscellaneous",
          "miscellaneous"
        ],
        [
          "ancestry",
          "ancestry"
        ],
        [
          "mutt",
          "mutt"
        ]
      ],
      "raw_glosses": [
        "(slang) A dog of miscellaneous ancestry; a mutt."
      ],
      "synonyms": [
        {
          "word": "Heinz 57"
        }
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "pavement special"
}