"upper decker" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "upper",
        "3": "deck",
        "4": "-er"
      },
      "expansion": "upper + deck + -er",
      "name": "af"
    }
  ],
  "etymology_text": "upper + deck + -er",
  "forms": [
    {
      "form": "upper deckers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
      },
      "expansion": "upper decker (plural upper deckers)",
      "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 terms suffixed with -er",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2014, John Waters, Role Models",
          "text": "Had he been doing “upper deckers” for years in his community?",
          "type": "quotation"
        },
        {
          "ref": "2017, Molly E. Lee, Love in the Friend Zone",
          "text": "Should've bet on him doing an upper decker.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The prank of defecating in the cistern of a toilet, so that flushing the toilet brings in dirty water instead of clean."
      ],
      "id": "en-upper_decker-en-noun-5WGTSuTS",
      "links": [
        [
          "prank",
          "prank"
        ],
        [
          "defecating",
          "defecate"
        ],
        [
          "cistern",
          "cistern"
        ],
        [
          "toilet",
          "toilet"
        ],
        [
          "flush",
          "flush"
        ]
      ],
      "raw_glosses": [
        "(slang) The prank of defecating in the cistern of a toilet, so that flushing the toilet brings in dirty water instead of clean."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "upper decker"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "upper",
        "3": "deck",
        "4": "-er"
      },
      "expansion": "upper + deck + -er",
      "name": "af"
    }
  ],
  "etymology_text": "upper + deck + -er",
  "forms": [
    {
      "form": "upper deckers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "nolinkhead": "1"
      },
      "expansion": "upper decker (plural upper deckers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms suffixed with -er",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2014, John Waters, Role Models",
          "text": "Had he been doing “upper deckers” for years in his community?",
          "type": "quotation"
        },
        {
          "ref": "2017, Molly E. Lee, Love in the Friend Zone",
          "text": "Should've bet on him doing an upper decker.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The prank of defecating in the cistern of a toilet, so that flushing the toilet brings in dirty water instead of clean."
      ],
      "links": [
        [
          "prank",
          "prank"
        ],
        [
          "defecating",
          "defecate"
        ],
        [
          "cistern",
          "cistern"
        ],
        [
          "toilet",
          "toilet"
        ],
        [
          "flush",
          "flush"
        ]
      ],
      "raw_glosses": [
        "(slang) The prank of defecating in the cistern of a toilet, so that flushing the toilet brings in dirty water instead of clean."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "upper decker"
}