"piss all" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "piss all (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "source": "w"
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          "parents": [],
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      "examples": [
        {
          "ref": "1994, Don Stahl, The Occultation:",
          "text": "\"You don't know piss-all, really,\" she says. \"You're a soft ha'porth. But I guess that's as how you can be a good man.\" She sighs, and he moves.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Nothing; nothing at all."
      ],
      "id": "en-piss_all-en-noun-BI2Ek7Hx",
      "links": [
        [
          "Nothing",
          "nothing"
        ]
      ],
      "raw_glosses": [
        "(vulgar) Nothing; nothing at all."
      ],
      "synonyms": [
        {
          "word": "bugger all"
        },
        {
          "word": "Fanny Adams"
        },
        {
          "word": "fuck all"
        },
        {
          "word": "jack all"
        },
        {
          "word": "screw all"
        },
        {
          "word": "sod all"
        },
        {
          "word": "nothing"
        },
        {
          "word": "piss-all"
        }
      ],
      "tags": [
        "uncountable",
        "vulgar"
      ]
    }
  ],
  "word": "piss all"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "piss all (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "English lemmas",
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      "examples": [
        {
          "ref": "1994, Don Stahl, The Occultation:",
          "text": "\"You don't know piss-all, really,\" she says. \"You're a soft ha'porth. But I guess that's as how you can be a good man.\" She sighs, and he moves.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Nothing; nothing at all."
      ],
      "links": [
        [
          "Nothing",
          "nothing"
        ]
      ],
      "raw_glosses": [
        "(vulgar) Nothing; nothing at all."
      ],
      "tags": [
        "uncountable",
        "vulgar"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "bugger all"
    },
    {
      "word": "Fanny Adams"
    },
    {
      "word": "fuck all"
    },
    {
      "word": "jack all"
    },
    {
      "word": "screw all"
    },
    {
      "word": "sod all"
    },
    {
      "word": "nothing"
    },
    {
      "word": "piss-all"
    }
  ],
  "word": "piss all"
}