"waste of breath" meaning in English

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      "expansion": "waste of breath",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Needless speech."
      ],
      "id": "en-waste_of_breath-en-noun-b9HlBFjU"
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          "source": "w+disamb"
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          "source": "w+disamb"
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      "examples": [
        {
          "ref": "2013, Days N' Daze (lyrics and music), “Misanthropic Drunken Loner”, in Rogue Taxidermy:",
          "text": "This is my misanthropic confession\nHumans are a waste of breath\nAnd don't think I exclude myself\nI'm an asshole just like you.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of waste of oxygen"
      ],
      "id": "en-waste_of_breath-en-noun-iZcvNdRn",
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          "waste of oxygen#English"
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      "synonyms": [
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          "word": "waste of oxygen"
        }
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  "word": "waste of breath"
}

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    "English entries with incorrect language header",
    "English lemmas",
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    "English nouns",
    "English nouns with unknown or uncertain plurals",
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  "head_templates": [
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      "expansion": "waste of breath",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Needless speech."
      ]
    },
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        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2013, Days N' Daze (lyrics and music), “Misanthropic Drunken Loner”, in Rogue Taxidermy:",
          "text": "This is my misanthropic confession\nHumans are a waste of breath\nAnd don't think I exclude myself\nI'm an asshole just like you.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of waste of oxygen"
      ],
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          "word": "waste of oxygen"
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  "word": "waste of breath"
}