"vacas gordas" meaning in Spanish

{
  "antonyms": [
    {
      "word": "vacas flacas"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f-p"
      },
      "expansion": "vacas gordas f pl (plural only)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish pluralia tantum",
          "parents": [
            "Pluralia tantum",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "es",
          "name": "Mammals",
          "orig": "es:Mammals",
          "parents": [
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "the boom years",
          "text": "los años de las vacas gordas",
          "type": "example"
        },
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1884-1885, Benito Pérez Galdós, Lo prohibido",
          "text": "El año 83 hallome, pues, con una merma considerable en mi fortuna y con cierta tendencia a trocar la condición de rentista por la de propietario. Mi cuenta corriente no me recordaba, ni con mucho, el apólogo de las vacas gordas, pues tanto la ordeñé, que hubo de terminar el año en los puros huesos.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Prosperity"
      ],
      "id": "en-vacas_gordas-es-noun-9Dafm4dK",
      "raw_glosses": [
        "(idiomatic) Prosperity"
      ],
      "tags": [
        "feminine",
        "idiomatic",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "vacas gordas"
}

{
  "antonyms": [
    {
      "word": "vacas flacas"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f-p"
      },
      "expansion": "vacas gordas f pl (plural only)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Requests for translations of Spanish quotations",
        "Spanish entries with incorrect language header",
        "Spanish feminine nouns",
        "Spanish idioms",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish nouns",
        "Spanish pluralia tantum",
        "Spanish terms with quotations",
        "Spanish terms with usage examples",
        "es:Mammals"
      ],
      "examples": [
        {
          "english": "the boom years",
          "text": "los años de las vacas gordas",
          "type": "example"
        },
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "1884-1885, Benito Pérez Galdós, Lo prohibido",
          "text": "El año 83 hallome, pues, con una merma considerable en mi fortuna y con cierta tendencia a trocar la condición de rentista por la de propietario. Mi cuenta corriente no me recordaba, ni con mucho, el apólogo de las vacas gordas, pues tanto la ordeñé, que hubo de terminar el año en los puros huesos.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Prosperity"
      ],
      "raw_glosses": [
        "(idiomatic) Prosperity"
      ],
      "tags": [
        "feminine",
        "idiomatic",
        "plural",
        "plural-only"
      ]
    }
  ],
  "word": "vacas gordas"
}