"pet rock" meaning in English

{
  "forms": [
    {
      "form": "pet rocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pet rock (plural pet rocks)",
      "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": "[2015 March 31, Margalit Fox, “Gary Dahl, Inventor of the Pet Rock, Dies at 78”, in The New York Times, →ISSN",
          "text": "Though the fad ran its course long ago, the phrase “pet rock” endures in the American lexicon, denoting (depending on whether it is uttered with contempt or admiration) a useless entity or a meteoric success.]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A rock one keeps and cares for as if it were a pet, often purchased as a novelty item and jokingly treated as having needs like those of a living animal."
      ],
      "id": "en-pet_rock-en-noun-EQtr8sD1",
      "links": [
        [
          "rock",
          "rock"
        ],
        [
          "pet",
          "pet"
        ],
        [
          "novelty",
          "novelty"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "rock as a pet",
          "word": "lemmikkikivi"
        }
      ],
      "wikipedia": [
        "Pet Rock"
      ]
    }
  ],
  "word": "pet rock"
}

{
  "forms": [
    {
      "form": "pet rocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pet rock (plural pet rocks)",
      "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 terms with quotations"
      ],
      "examples": [
        {
          "ref": "[2015 March 31, Margalit Fox, “Gary Dahl, Inventor of the Pet Rock, Dies at 78”, in The New York Times, →ISSN",
          "text": "Though the fad ran its course long ago, the phrase “pet rock” endures in the American lexicon, denoting (depending on whether it is uttered with contempt or admiration) a useless entity or a meteoric success.]",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A rock one keeps and cares for as if it were a pet, often purchased as a novelty item and jokingly treated as having needs like those of a living animal."
      ],
      "links": [
        [
          "rock",
          "rock"
        ],
        [
          "pet",
          "pet"
        ],
        [
          "novelty",
          "novelty"
        ]
      ],
      "wikipedia": [
        "Pet Rock"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "rock as a pet",
      "word": "lemmikkikivi"
    }
  ],
  "word": "pet rock"
}