"butt-naked" meaning in English

{
  "etymology_text": "Probably related to (and perhaps simply a variant of) buck naked. It is not clear which of the two forms came first, but the earliest written evidence suggests buck naked is present some four decades earlier.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "butt-naked (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "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"
        }
      ],
      "examples": [
        {
          "ref": "1998, John Peel, The Outer Limits: The Vanished, New York: Tor Kids, →ISBN, page 8:",
          "text": "They could hardly have all marched off butt-naked.",
          "type": "quote"
        },
        {
          "ref": "2008, Chris Kovach, chapter 11, in Alcoholics Synonymous, →ISBN:",
          "text": "He cannot picture life without alcohol, drugs or butt-naked rooftop escapades.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Stark naked, completely nude."
      ],
      "id": "en-butt-naked-en-adj-6qjh3hj1",
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "Stark naked",
          "stark naked"
        ],
        [
          "nude",
          "nude"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, informal) Stark naked, completely nude."
      ],
      "synonyms": [
        {
          "word": "nude"
        },
        {
          "word": "butt naked"
        }
      ],
      "tags": [
        "Canada",
        "US",
        "informal",
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-butt-naked.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/En-au-butt-naked.ogg/En-au-butt-naked.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/8/8b/En-au-butt-naked.ogg"
    }
  ],
  "word": "butt-naked"
}

{
  "etymology_text": "Probably related to (and perhaps simply a variant of) buck naked. It is not clear which of the two forms came first, but the earliest written evidence suggests buck naked is present some four decades earlier.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "butt-naked (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "American English",
        "Canadian English",
        "English adjectives",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1998, John Peel, The Outer Limits: The Vanished, New York: Tor Kids, →ISBN, page 8:",
          "text": "They could hardly have all marched off butt-naked.",
          "type": "quote"
        },
        {
          "ref": "2008, Chris Kovach, chapter 11, in Alcoholics Synonymous, →ISBN:",
          "text": "He cannot picture life without alcohol, drugs or butt-naked rooftop escapades.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Stark naked, completely nude."
      ],
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "Stark naked",
          "stark naked"
        ],
        [
          "nude",
          "nude"
        ]
      ],
      "raw_glosses": [
        "(Canada, US, informal) Stark naked, completely nude."
      ],
      "tags": [
        "Canada",
        "US",
        "informal",
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-butt-naked.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/En-au-butt-naked.ogg/En-au-butt-naked.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/8/8b/En-au-butt-naked.ogg"
    }
  ],
  "synonyms": [
    {
      "word": "nude"
    },
    {
      "word": "butt naked"
    }
  ],
  "word": "butt-naked"
}