"a u was Murzynów biją" meaning in Polish

{
  "etymology_text": "Derived from a popular joke of Russian origin, along the following lines:\n: An American and a Russian meet at a bar. The Russian claims that the Soviet Union is a land of freedom. The American asks, \"Can you publicly criticize the government?\" The Russian goes silent. The American presses on: \"Can you start your own business?\" Again, no response. \"Can you even move to a different country?\" Finally, the Russian responds, \"And you are lynching Negroes!\"\nSee also: And you are lynching Negroes.",
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "phrase",
        "head": "a u was Murzynów biją"
      },
      "expansion": "a u was Murzynów biją",
      "name": "head"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Polish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a stereotypical tu quoque response to criticism"
      ],
      "id": "en-a_u_was_Murzynów_biją-pl-phrase-OgPb4bRz",
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "tu quoque",
          "tu quoque#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, humorous) a stereotypical tu quoque response to criticism"
      ],
      "tags": [
        "humorous",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/a u vas muˈʐɨ.nuv ˈbi.jɔw̃/"
    },
    {
      "rhymes": "-ijɔw̃"
    }
  ],
  "word": "a u was Murzynów biją"
}

{
  "etymology_text": "Derived from a popular joke of Russian origin, along the following lines:\n: An American and a Russian meet at a bar. The Russian claims that the Soviet Union is a land of freedom. The American asks, \"Can you publicly criticize the government?\" The Russian goes silent. The American presses on: \"Can you start your own business?\" Again, no response. \"Can you even move to a different country?\" Finally, the Russian responds, \"And you are lynching Negroes!\"\nSee also: And you are lynching Negroes.",
  "head_templates": [
    {
      "args": {
        "1": "pl",
        "2": "phrase",
        "head": "a u was Murzynów biją"
      },
      "expansion": "a u was Murzynów biją",
      "name": "head"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Polish entries with incorrect language header",
        "Polish humorous terms",
        "Polish idioms",
        "Polish lemmas",
        "Polish multiword terms",
        "Polish phrases",
        "Polish terms with IPA pronunciation",
        "Rhymes:Polish/ijɔw̃"
      ],
      "glosses": [
        "a stereotypical tu quoque response to criticism"
      ],
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "tu quoque",
          "tu quoque#English"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, humorous) a stereotypical tu quoque response to criticism"
      ],
      "tags": [
        "humorous",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/a u vas muˈʐɨ.nuv ˈbi.jɔw̃/"
    },
    {
      "rhymes": "-ijɔw̃"
    }
  ],
  "word": "a u was Murzynów biją"
}