"whatsername" meaning in English

{
  "etymology_text": "Derived from running together the words in the phrase \"what is her name?\".",
  "forms": [
    {
      "form": "whatsernames",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "whatsername (plural whatsernames)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A placeholder for the name of a woman whose name the speaker can not bring to mind."
      ],
      "id": "en-whatsername-en-noun-V4dZzOEz",
      "links": [
        [
          "placeholder",
          "placeholder"
        ]
      ],
      "raw_glosses": [
        "(colloquial) A placeholder for the name of a woman whose name the speaker can not bring to mind."
      ],
      "related": [
        {
          "word": "whatsisname"
        },
        {
          "word": "whatsit"
        },
        {
          "word": "whatchamacallit"
        }
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "whatsername"
}

{
  "etymology_text": "Derived from running together the words in the phrase \"what is her name?\".",
  "forms": [
    {
      "form": "whatsernames",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "whatsername (plural whatsernames)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "whatsisname"
    },
    {
      "word": "whatsit"
    },
    {
      "word": "whatchamacallit"
    }
  ],
  "senses": [
    {
      "categories": [
        "English colloquialisms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English placeholder terms",
        "Pages with 1 entry",
        "Pages with entries",
        "en:People"
      ],
      "glosses": [
        "A placeholder for the name of a woman whose name the speaker can not bring to mind."
      ],
      "links": [
        [
          "placeholder",
          "placeholder"
        ]
      ],
      "raw_glosses": [
        "(colloquial) A placeholder for the name of a woman whose name the speaker can not bring to mind."
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "whatsername"
}