"Liffey water" meaning in English

{
  "etymology_text": "From the name of the Irish river. Possibly also rhyming slang for porter (“kind of beer”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Liffey water (uncountable)",
      "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"
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          "source": "w"
        },
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          "parents": [],
          "source": "w"
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        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
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      ],
      "examples": [
        {
          "ref": "1996, Theatre Record, volume 16, numbers 9-15, page 40:",
          "text": "Good value over a pint of Liffey-water, but so what?",
          "type": "quote"
        },
        {
          "ref": "2011, Time Out Rome, page 218:",
          "text": "It serves a decent pint of Liffey water, as well as beaming in football from the British Isles.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Guinness (brand of dark stout beer)"
      ],
      "id": "en-Liffey_water-en-noun-x0XywEcp",
      "links": [
        [
          "Guinness",
          "Guinness"
        ]
      ],
      "raw_glosses": [
        "(slang) Guinness (brand of dark stout beer)"
      ],
      "tags": [
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "Liffey water"
}

{
  "etymology_text": "From the name of the Irish river. Possibly also rhyming slang for porter (“kind of beer”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Liffey water (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1996, Theatre Record, volume 16, numbers 9-15, page 40:",
          "text": "Good value over a pint of Liffey-water, but so what?",
          "type": "quote"
        },
        {
          "ref": "2011, Time Out Rome, page 218:",
          "text": "It serves a decent pint of Liffey water, as well as beaming in football from the British Isles.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Guinness (brand of dark stout beer)"
      ],
      "links": [
        [
          "Guinness",
          "Guinness"
        ]
      ],
      "raw_glosses": [
        "(slang) Guinness (brand of dark stout beer)"
      ],
      "tags": [
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "Liffey water"
}