"Velcro dog" meaning in English

{
  "etymology_text": "Named after the fastener.",
  "forms": [
    {
      "form": "Velcro dogs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Velcro dog (plural Velcro dogs)",
      "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"
        }
      ],
      "glosses": [
        "A dog that is very attached to its owner and rarely leaves their side."
      ],
      "id": "en-Velcro_dog-en-noun--3kytWcQ",
      "links": [
        [
          "attached",
          "attached"
        ],
        [
          "owner",
          "owner"
        ]
      ],
      "raw_glosses": [
        "(slang) A dog that is very attached to its owner and rarely leaves their side."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "Velcro dog"
}

{
  "etymology_text": "Named after the fastener.",
  "forms": [
    {
      "form": "Velcro dogs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Velcro dog (plural Velcro dogs)",
      "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"
      ],
      "glosses": [
        "A dog that is very attached to its owner and rarely leaves their side."
      ],
      "links": [
        [
          "attached",
          "attached"
        ],
        [
          "owner",
          "owner"
        ]
      ],
      "raw_glosses": [
        "(slang) A dog that is very attached to its owner and rarely leaves their side."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "Velcro dog"
}