"true dat" meaning in English

{
  "etymology_text": "Altered pronunciation of true that.",
  "head_templates": [
    {
      "args": {},
      "expansion": "true dat",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "2002, Sheila Copeland, Princess Sister, Sepia/BET Books, page 227",
          "text": "\"No one would ever think you were born in Paris.\"\n\"True dat.\"",
          "type": "quotation"
        },
        {
          "ref": "2007, Jennifer Echols, The Boys Next Door, Simon Pulse, page 109",
          "text": "\"And Adam looks a lot like Sean.\"\n\"True dat.\"",
          "type": "quotation"
        },
        {
          "ref": "2011 20 January, Bill Prady, Steven Molaro & Eric Kaplan, \"The Love Car Displacement\", episode 4-13 of The Big Bang Theory, 00:15:19-00:15:33",
          "text": "Penny: I really appreciate you letting me stay here tonight. […] I know it's kind of weird.\nLeonard Hofstadter: True dat.\nPenny: \"True dat?\"\nLeonard Hofstadter: I've gotten a lot more street since we broke up."
        }
      ],
      "glosses": [
        "An emphatic statement of agreement or affirmation."
      ],
      "id": "en-true_dat-en-intj-0ZGgbUCn",
      "links": [
        [
          "agreement",
          "agreement#English"
        ],
        [
          "affirmation",
          "affirmation#English"
        ]
      ],
      "raw_glosses": [
        "(slang) An emphatic statement of agreement or affirmation."
      ],
      "synonyms": [
        {
          "word": "tru dat"
        },
        {
          "tags": [
            "Internet"
          ],
          "word": "trufax"
        },
        {
          "word": "true that"
        }
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-true dat.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/61/En-au-true_dat.ogg/En-au-true_dat.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/61/En-au-true_dat.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "true dat"
}

{
  "etymology_text": "Altered pronunciation of true that.",
  "head_templates": [
    {
      "args": {},
      "expansion": "true dat",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English interjections",
        "English lemmas",
        "English multiword terms",
        "English slang",
        "English terms with audio links",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2002, Sheila Copeland, Princess Sister, Sepia/BET Books, page 227",
          "text": "\"No one would ever think you were born in Paris.\"\n\"True dat.\"",
          "type": "quotation"
        },
        {
          "ref": "2007, Jennifer Echols, The Boys Next Door, Simon Pulse, page 109",
          "text": "\"And Adam looks a lot like Sean.\"\n\"True dat.\"",
          "type": "quotation"
        },
        {
          "ref": "2011 20 January, Bill Prady, Steven Molaro & Eric Kaplan, \"The Love Car Displacement\", episode 4-13 of The Big Bang Theory, 00:15:19-00:15:33",
          "text": "Penny: I really appreciate you letting me stay here tonight. […] I know it's kind of weird.\nLeonard Hofstadter: True dat.\nPenny: \"True dat?\"\nLeonard Hofstadter: I've gotten a lot more street since we broke up."
        }
      ],
      "glosses": [
        "An emphatic statement of agreement or affirmation."
      ],
      "links": [
        [
          "agreement",
          "agreement#English"
        ],
        [
          "affirmation",
          "affirmation#English"
        ]
      ],
      "raw_glosses": [
        "(slang) An emphatic statement of agreement or affirmation."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-true dat.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/61/En-au-true_dat.ogg/En-au-true_dat.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/61/En-au-true_dat.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "tru dat"
    },
    {
      "tags": [
        "Internet"
      ],
      "word": "trufax"
    },
    {
      "word": "true that"
    }
  ],
  "word": "true dat"
}