"butter my butt and call me a biscuit" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "butter my butt and call me a biscuit",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Southern US English",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2010, Linda Francis Lee, The Devil in the Junior League: A Novel",
          "text": "Butter my butt and call me a biscuit, could you be any more beautiful?",
          "type": "quotation"
        },
        {
          "ref": "2014, Jennifer Lynn, New Prints In Old Calico, page 140",
          "text": "“Well, butter my butt and call me a biscuit,” the brunette breathed. “I never saw that one coming.”",
          "type": "quotation"
        },
        {
          "ref": "2014, Kim Richardson, Mystics #2: The Alpha Nation",
          "text": "“Butter my butt and call me a biscuit,” said Simon. He stared at Zoey, and a sheepish smile materialized on his face.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "id": "en-butter_my_butt_and_call_me_a_biscuit-en-intj-c~mT5aOd",
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(Southern US, colloquial) An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "synonyms": [
        {
          "word": "slap my ass and call me Judy"
        },
        {
          "word": "slap my ass and call me Sally"
        },
        {
          "word": "dip me in honey and throw me to the lesbians"
        },
        {
          "word": "wow"
        },
        {
          "word": "butter my butt and call it a biscuit"
        }
      ],
      "tags": [
        "Southern-US",
        "colloquial"
      ]
    }
  ],
  "word": "butter my butt and call me a biscuit"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "butter my butt and call me a biscuit",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English colloquialisms",
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "Southern US English"
      ],
      "examples": [
        {
          "ref": "2010, Linda Francis Lee, The Devil in the Junior League: A Novel",
          "text": "Butter my butt and call me a biscuit, could you be any more beautiful?",
          "type": "quotation"
        },
        {
          "ref": "2014, Jennifer Lynn, New Prints In Old Calico, page 140",
          "text": "“Well, butter my butt and call me a biscuit,” the brunette breathed. “I never saw that one coming.”",
          "type": "quotation"
        },
        {
          "ref": "2014, Kim Richardson, Mystics #2: The Alpha Nation",
          "text": "“Butter my butt and call me a biscuit,” said Simon. He stared at Zoey, and a sheepish smile materialized on his face.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(Southern US, colloquial) An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "tags": [
        "Southern-US",
        "colloquial"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "slap my ass and call me Judy"
    },
    {
      "word": "slap my ass and call me Sally"
    },
    {
      "word": "dip me in honey and throw me to the lesbians"
    },
    {
      "word": "wow"
    },
    {
      "word": "butter my butt and call it a biscuit"
    }
  ],
  "word": "butter my butt and call me a biscuit"
}