"Grand Poobah" meaning in English

{
  "forms": [
    {
      "form": "Grand Poobahs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Grand Poobah"
      },
      "expansion": "Grand Poobah (plural Grand Poobahs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "grand poobah"
        }
      ],
      "categories": [
        {
          "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"
        }
      ],
      "examples": [
        {
          "ref": "1960-1966, The Flintstones (cartoon)",
          "text": "Grand Poobah/Grand Imperial Poobah of the Loyal Order of Water Buffaloes Lodge No. 26."
        },
        {
          "ref": "1979, Happy Days (TV series)",
          "text": "Grand Poobah of Leopard Lodge No. 462\" in Milwaukee."
        }
      ],
      "glosses": [
        "Alternative letter-case form of grand poobah"
      ],
      "id": "en-Grand_Poobah-en-noun-3sIYCiwD",
      "links": [
        [
          "grand poobah",
          "grand poobah#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "Grand Poobah"
}

{
  "forms": [
    {
      "form": "Grand Poobahs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Grand Poobah"
      },
      "expansion": "Grand Poobah (plural Grand Poobahs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "grand poobah"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1960-1966, The Flintstones (cartoon)",
          "text": "Grand Poobah/Grand Imperial Poobah of the Loyal Order of Water Buffaloes Lodge No. 26."
        },
        {
          "ref": "1979, Happy Days (TV series)",
          "text": "Grand Poobah of Leopard Lodge No. 462\" in Milwaukee."
        }
      ],
      "glosses": [
        "Alternative letter-case form of grand poobah"
      ],
      "links": [
        [
          "grand poobah",
          "grand poobah#English"
        ]
      ],
      "tags": [
        "alt-of"
      ]
    }
  ],
  "word": "Grand Poobah"
}