"the whole world and his dog" meaning in English

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      "expansion": "the whole world and his dog pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "British English",
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      "examples": [
        {
          "text": "I'd love to go to the Harry Potter opening, but the whole world and his dog will be there and I don't like crowds"
        }
      ],
      "glosses": [
        "Everybody; too many people; a huge crowd."
      ],
      "id": "en-the_whole_world_and_his_dog-en-noun-s6Hf4Ur9",
      "links": [
        [
          "Everybody",
          "everybody"
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          "people",
          "people"
        ],
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          "crowd",
          "crowd"
        ]
      ],
      "raw_glosses": [
        "(British, idiomatic) Everybody; too many people; a huge crowd."
      ],
      "related": [
        {
          "word": "the whole world"
        },
        {
          "english": "whole ___; everything / the whole thing",
          "word": "for a list of terms that mean"
        },
        {
          "word": "the whole nine yards"
        },
        {
          "english": "almost nobody",
          "word": "one man and his dog"
        }
      ],
      "synonyms": [
        {
          "word": "everyone and their dog"
        },
        {
          "word": "everybody"
        }
      ],
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        "British",
        "idiomatic",
        "plural",
        "plural-only"
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  ],
  "word": "the whole world and his dog"
}

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "the whole world"
    },
    {
      "english": "whole ___; everything / the whole thing",
      "word": "for a list of terms that mean"
    },
    {
      "word": "the whole nine yards"
    },
    {
      "english": "almost nobody",
      "word": "one man and his dog"
    }
  ],
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      "examples": [
        {
          "text": "I'd love to go to the Harry Potter opening, but the whole world and his dog will be there and I don't like crowds"
        }
      ],
      "glosses": [
        "Everybody; too many people; a huge crowd."
      ],
      "links": [
        [
          "Everybody",
          "everybody"
        ],
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          "people",
          "people"
        ],
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          "crowd",
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      ],
      "raw_glosses": [
        "(British, idiomatic) Everybody; too many people; a huge crowd."
      ],
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        "idiomatic",
        "plural",
        "plural-only"
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  "synonyms": [
    {
      "word": "everyone and their dog"
    },
    {
      "word": "everybody"
    }
  ],
  "word": "the whole world and his dog"
}