"talk shit" meaning in English

{
  "etymology_text": ": talk shit < → δείτε τις λέξεις talk και shit",
  "forms": [
    {
      "form": "talk shit"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Αργκό (αγγλικά)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Χυδαιολογίες (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He’s always talking shit about them behind their backs.",
          "translation": "Συνέχεια τους θάβει πίσω από την πλάτη τους."
        },
        {
          "text": "Who are you talking shit about again?",
          "translation": "Ποιον θάβετε πάλι;"
        },
        {
          "text": "We talked shit about you while you were out.",
          "translation": "Σε θάψαμε την ώρα που έλειπες."
        }
      ],
      "glosses": [
        "άλλη μορφή του shit talk"
      ],
      "id": "el-talk_shit-en-phrase-Zp0fJgdw",
      "raw_tags": [
        "χυδαίο",
        "αργκό"
      ]
    }
  ],
  "word": "talk shit"
}

{
  "etymology_text": ": talk shit < → δείτε τις λέξεις talk και shit",
  "forms": [
    {
      "form": "talk shit"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Αργκό (αγγλικά)",
        "Χυδαιολογίες (αγγλικά)"
      ],
      "examples": [
        {
          "text": "He’s always talking shit about them behind their backs.",
          "translation": "Συνέχεια τους θάβει πίσω από την πλάτη τους."
        },
        {
          "text": "Who are you talking shit about again?",
          "translation": "Ποιον θάβετε πάλι;"
        },
        {
          "text": "We talked shit about you while you were out.",
          "translation": "Σε θάψαμε την ώρα που έλειπες."
        }
      ],
      "glosses": [
        "άλλη μορφή του shit talk"
      ],
      "raw_tags": [
        "χυδαίο",
        "αργκό"
      ]
    }
  ],
  "word": "talk shit"
}