"Irish twin" meaning in English

{
  "etymology_text": "Originally used (in the nineteenth century) to mock the fertility of Irish families, referencing the stereotype that they have children in quicker succession.",
  "forms": [
    {
      "form": "Irish twins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Irish twin (plural Irish twins)",
      "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": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Family members",
          "orig": "en:Family members",
          "parents": [
            "Family",
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Siblings",
          "orig": "en:Siblings",
          "parents": [
            "Family members",
            "Family",
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2014, Karyn Gerrard, His Wicked Celtic Kiss, Simon and Schuster",
          "text": "I'm the oldest, my brother, Dylan, is the next oldest—my Irish twin.” “Irish twin?” “He's ten months younger, what is referred to sarcastically as an Irish twin. My parents still live in the same flat in Dublin I grew up in. I haven't been home much the last twelve years or so. How about you, darlin'?”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Either of a pair of siblings born less than 12 months apart, especially if born within the same calendar year or school year or born one year apart."
      ],
      "id": "en-Irish_twin-en-noun-H10~061I",
      "links": [
        [
          "sibling",
          "sibling"
        ]
      ],
      "raw_glosses": [
        "(rare, slang, offensive) Either of a pair of siblings born less than 12 months apart, especially if born within the same calendar year or school year or born one year apart."
      ],
      "synonyms": [
        {
          "word": "Catholic twin"
        }
      ],
      "tags": [
        "offensive",
        "rare",
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-Irish twin.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/5c/En-au-Irish_twin.ogg/En-au-Irish_twin.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/En-au-Irish_twin.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "Irish twin"
}

{
  "etymology_text": "Originally used (in the nineteenth century) to mock the fertility of Irish families, referencing the stereotype that they have children in quicker succession.",
  "forms": [
    {
      "form": "Irish twins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Irish twin (plural Irish twins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English offensive terms",
        "English slang",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "English terms with rare senses",
        "en:Family members",
        "en:Siblings"
      ],
      "examples": [
        {
          "ref": "2014, Karyn Gerrard, His Wicked Celtic Kiss, Simon and Schuster",
          "text": "I'm the oldest, my brother, Dylan, is the next oldest—my Irish twin.” “Irish twin?” “He's ten months younger, what is referred to sarcastically as an Irish twin. My parents still live in the same flat in Dublin I grew up in. I haven't been home much the last twelve years or so. How about you, darlin'?”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Either of a pair of siblings born less than 12 months apart, especially if born within the same calendar year or school year or born one year apart."
      ],
      "links": [
        [
          "sibling",
          "sibling"
        ]
      ],
      "raw_glosses": [
        "(rare, slang, offensive) Either of a pair of siblings born less than 12 months apart, especially if born within the same calendar year or school year or born one year apart."
      ],
      "synonyms": [
        {
          "word": "Catholic twin"
        }
      ],
      "tags": [
        "offensive",
        "rare",
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-Irish twin.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/5c/En-au-Irish_twin.ogg/En-au-Irish_twin.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/En-au-Irish_twin.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "Irish twin"
}