"big bad" meaning in English

{
  "etymology_text": "The noun was back-formed in 1998 in the episode “Bewitched, Bothered and Bewildered”, season two of Buffy the Vampire Slayer. It is a nominalization derived from the long-established adjectival pattern within Big Bad Wolf and collocative constructions inspired by it (e.g., I tried to reason with her, but to her I'm just the big bad authority figure who can't be trusted).",
  "forms": [
    {
      "form": "big bads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "big bad (plural big bads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English alliterative compounds",
          "parents": [
            "Alliterative compounds",
            "Alliterative phrases",
            "Compound terms",
            "Phrases",
            "Terms by etymology",
            "Lemmas",
            "Multiword terms"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fiction",
          "orig": "en:Fiction",
          "parents": [
            "Artistic works",
            "Art",
            "Culture",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2017 September 19, Gwilym Mumford, “Kingsman: The Golden Circle review – spy sequel reaches new heights of skyscraping silliness”, in the Guardian:",
          "text": "Charlie, now menacingly equipped with a bionic arm, is these days in the service of new pantomime big bad, Poppy Adams, played with lysergic glee by Julianne Moore.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A major adversary or antagonist of a piece of fiction."
      ],
      "id": "en-big_bad-en-noun-YQ1dETuV",
      "links": [
        [
          "adversary",
          "adversary"
        ],
        [
          "antagonist",
          "antagonist"
        ]
      ],
      "related": [
        {
          "word": "big and bad"
        }
      ]
    }
  ],
  "word": "big bad"
}

{
  "etymology_text": "The noun was back-formed in 1998 in the episode “Bewitched, Bothered and Bewildered”, season two of Buffy the Vampire Slayer. It is a nominalization derived from the long-established adjectival pattern within Big Bad Wolf and collocative constructions inspired by it (e.g., I tried to reason with her, but to her I'm just the big bad authority figure who can't be trusted).",
  "forms": [
    {
      "form": "big bads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "big bad (plural big bads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "big and bad"
    }
  ],
  "senses": [
    {
      "categories": [
        "English alliterative compounds",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms derived from fiction",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Fiction"
      ],
      "examples": [
        {
          "ref": "2017 September 19, Gwilym Mumford, “Kingsman: The Golden Circle review – spy sequel reaches new heights of skyscraping silliness”, in the Guardian:",
          "text": "Charlie, now menacingly equipped with a bionic arm, is these days in the service of new pantomime big bad, Poppy Adams, played with lysergic glee by Julianne Moore.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A major adversary or antagonist of a piece of fiction."
      ],
      "links": [
        [
          "adversary",
          "adversary"
        ],
        [
          "antagonist",
          "antagonist"
        ]
      ]
    }
  ],
  "word": "big bad"
}