"B-town" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "B-town",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Indian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Bollywood",
          "orig": "en:Bollywood",
          "parents": [
            "Film",
            "India",
            "Entertainment",
            "Mass media",
            "Asia",
            "Culture",
            "Media",
            "Earth",
            "Eurasia",
            "Society",
            "Communication",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012, James Lambert, “Beyond Hobson-Jobson: A new lexicography for Indian English”, in World Englishes, page 302",
          "text": "Bollywood is also very commonly known as both tinsel town and B-town, neither of which is listed in the dictionaries.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The Bollywood movie industry."
      ],
      "id": "en-B-town-en-name-UVfRVDUB",
      "links": [
        [
          "Bollywood",
          "Bollywood"
        ]
      ],
      "raw_glosses": [
        "(India, slang) The Bollywood movie industry."
      ],
      "tags": [
        "India",
        "slang"
      ]
    }
  ],
  "word": "B-town"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "B-town",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English slang",
        "English terms with quotations",
        "English uncountable nouns",
        "Indian English",
        "en:Bollywood"
      ],
      "examples": [
        {
          "ref": "2012, James Lambert, “Beyond Hobson-Jobson: A new lexicography for Indian English”, in World Englishes, page 302",
          "text": "Bollywood is also very commonly known as both tinsel town and B-town, neither of which is listed in the dictionaries.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The Bollywood movie industry."
      ],
      "links": [
        [
          "Bollywood",
          "Bollywood"
        ]
      ],
      "raw_glosses": [
        "(India, slang) The Bollywood movie industry."
      ],
      "tags": [
        "India",
        "slang"
      ]
    }
  ],
  "word": "B-town"
}