"knocker-upper" meaning in English

{
  "etymology_text": "By a regular pattern for (informal) nouns seen also in similar forms, such as fixer-upper and cleaner-upper; the sire sense involves an extra degree of wordplay, as an alternative surface analysis of knock (h)er up + -er is playfully apparent (who knocked 'er up?).",
  "forms": [
    {
      "form": "knocker-uppers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "knocker-upper"
      },
      "expansion": "knocker-upper (plural knocker-uppers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "person who knocks to awaken in the morning",
          "word": "knocker-up"
        }
      ],
      "categories": [
        {
          "_dis": "59 41",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "67 33",
          "kind": "other",
          "name": "English links with manual fragments",
          "parents": [
            "Links with manual fragments",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "62 38",
          "kind": "other",
          "name": "English terms suffixed with -er",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "72 28",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "69 31",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Alternative form of knocker-up (person who knocks to awaken in the morning)."
      ],
      "id": "en-knocker-upper-en-noun-YssND79z",
      "links": [
        [
          "knocker-up",
          "knocker-up#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    },
    {
      "categories": [
        {
          "_dis": "30 70",
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "What, Shelley is pregnant?! Who's the knocker-upper? [ = Who's the father?]",
          "type": "example"
        }
      ],
      "glosses": [
        "The male who has sired a pregnancy."
      ],
      "id": "en-knocker-upper-en-noun-SAH1Q2Hn",
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "male",
          "male"
        ],
        [
          "sired",
          "sire#Verb"
        ],
        [
          "pregnancy",
          "pregnancy"
        ]
      ],
      "raw_glosses": [
        "(informal, humorous) The male who has sired a pregnancy."
      ],
      "synonyms": [
        {
          "word": "sire"
        },
        {
          "word": "father"
        },
        {
          "word": "dad"
        },
        {
          "word": "daddy"
        },
        {
          "word": "baby daddy"
        }
      ],
      "tags": [
        "humorous",
        "informal"
      ]
    }
  ],
  "word": "knocker-upper"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English links with manual fragments",
    "English multiword terms",
    "English nouns",
    "English terms suffixed with -er",
    "Pages with 1 entry",
    "Pages with entries",
    "en:People"
  ],
  "etymology_text": "By a regular pattern for (informal) nouns seen also in similar forms, such as fixer-upper and cleaner-upper; the sire sense involves an extra degree of wordplay, as an alternative surface analysis of knock (h)er up + -er is playfully apparent (who knocked 'er up?).",
  "forms": [
    {
      "form": "knocker-uppers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "knocker-upper"
      },
      "expansion": "knocker-upper (plural knocker-uppers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "person who knocks to awaken in the morning",
          "word": "knocker-up"
        }
      ],
      "glosses": [
        "Alternative form of knocker-up (person who knocks to awaken in the morning)."
      ],
      "links": [
        [
          "knocker-up",
          "knocker-up#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    },
    {
      "categories": [
        "English humorous terms",
        "English informal terms",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "What, Shelley is pregnant?! Who's the knocker-upper? [ = Who's the father?]",
          "type": "example"
        }
      ],
      "glosses": [
        "The male who has sired a pregnancy."
      ],
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "male",
          "male"
        ],
        [
          "sired",
          "sire#Verb"
        ],
        [
          "pregnancy",
          "pregnancy"
        ]
      ],
      "raw_glosses": [
        "(informal, humorous) The male who has sired a pregnancy."
      ],
      "synonyms": [
        {
          "word": "sire"
        },
        {
          "word": "father"
        },
        {
          "word": "dad"
        },
        {
          "word": "daddy"
        },
        {
          "word": "baby daddy"
        }
      ],
      "tags": [
        "humorous",
        "informal"
      ]
    }
  ],
  "word": "knocker-upper"
}