"slap my ass and call me Judy" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "slap my ass and call me Judy",
      "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": "1996, Amy Paulsen, True Friends, HarperCollins",
          "text": "(Between bites of taco shells, he does manage to sample one of Monica's dishes, and he likes it well enough to shout, \"Slap my ass and call me Judy!\") April 17, 1995: Monica and Fake Monica (the woman who stole her credit cards) audition ...",
          "type": "quotation"
        },
        {
          "ref": "2012, Wendy Markham, Slightly Engaged, Harlequin",
          "text": "“But both of the girls are positive that they'll want their own rings when they get engaged,” Mrs. Candell goes on, “so I decided my diamond is there for Jack whenever he wants it. And...he wants it.” Well, slap my ass and call me Judy! Better yet ...",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "id": "en-slap_my_ass_and_call_me_Judy-en-intj-c~mT5aOd",
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(Southern US, colloquial, mildly vulgar) An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "synonyms": [
        {
          "sense": "see",
          "word": "butter my butt and call me a biscuit"
        }
      ],
      "tags": [
        "Southern-US",
        "colloquial",
        "mildly",
        "vulgar"
      ]
    }
  ],
  "word": "slap my ass and call me Judy"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "slap my ass and call me Judy",
      "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",
        "English vulgarities",
        "Southern US English"
      ],
      "examples": [
        {
          "ref": "1996, Amy Paulsen, True Friends, HarperCollins",
          "text": "(Between bites of taco shells, he does manage to sample one of Monica's dishes, and he likes it well enough to shout, \"Slap my ass and call me Judy!\") April 17, 1995: Monica and Fake Monica (the woman who stole her credit cards) audition ...",
          "type": "quotation"
        },
        {
          "ref": "2012, Wendy Markham, Slightly Engaged, Harlequin",
          "text": "“But both of the girls are positive that they'll want their own rings when they get engaged,” Mrs. Candell goes on, “so I decided my diamond is there for Jack whenever he wants it. And...he wants it.” Well, slap my ass and call me Judy! Better yet ...",
          "type": "quotation"
        }
      ],
      "glosses": [
        "An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "links": [
        [
          "astonishment",
          "astonishment"
        ]
      ],
      "raw_glosses": [
        "(Southern US, colloquial, mildly vulgar) An expression of astonishment upon learning something unbelievable (usually positive)."
      ],
      "tags": [
        "Southern-US",
        "colloquial",
        "mildly",
        "vulgar"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "see",
      "word": "butter my butt and call me a biscuit"
    }
  ],
  "word": "slap my ass and call me Judy"
}