"talk a big game" meaning in English

{
  "forms": [
    {
      "form": "talks a big game",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "talking a big game",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "talked a big game",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "talked a big game",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "talk a big game (third-person singular simple present talks a big game, present participle talking a big game, simple past and past participle talked a big game)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "talk a good game"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2019 January 31, Ian Bogost, “Apple’s Empty Grandstanding About Privacy”, in The Atlantic",
          "text": "That’s one way to understand Apple’s empty message about privacy. Tim Cook talks a big game, but at the end of the day, his company is allowing the surveillance-capitalism atrocities it claims to oppose.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of talk a good game"
      ],
      "id": "en-talk_a_big_game-en-verb-~jVLpkuX",
      "links": [
        [
          "talk a good game",
          "talk a good game#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "talk a big game"
}

{
  "forms": [
    {
      "form": "talks a big game",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "talking a big game",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "talked a big game",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "talked a big game",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "talk a big game (third-person singular simple present talks a big game, present participle talking a big game, simple past and past participle talked a big game)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "talk a good game"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English verbs"
      ],
      "examples": [
        {
          "ref": "2019 January 31, Ian Bogost, “Apple’s Empty Grandstanding About Privacy”, in The Atlantic",
          "text": "That’s one way to understand Apple’s empty message about privacy. Tim Cook talks a big game, but at the end of the day, his company is allowing the surveillance-capitalism atrocities it claims to oppose.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of talk a good game"
      ],
      "links": [
        [
          "talk a good game",
          "talk a good game#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "talk a big game"
}