"brass balls" meaning in English

{
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      "expansion": "brass balls pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "derived": [
        {
          "word": "brass ovaries"
        }
      ],
      "examples": [
        {
          "ref": "1986, Tim Kazurinsky, Denise DeClue, About Last Night, spoken by Bernie (Jim Belushi):",
          "text": "You've got a lot of brass balls, you know that. I do all the work, you take all the credit. You know what your problem is? Your face.",
          "type": "quote"
        },
        {
          "ref": "1992, David Mamet, Glengarry Glen Ross, spoken by Blake (Alec Baldwin):",
          "text": "Gentlemen, do you know what it takes to sell real estate? (Picks up a physical pair of brass balls and holds them at groin height.) It takes brass balls to sell real estate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Shamelessness, cheek, brazenness."
      ],
      "id": "en-brass_balls-en-noun-AmIkBo82",
      "links": [
        [
          "Shamelessness",
          "shamelessness"
        ],
        [
          "cheek",
          "cheek"
        ],
        [
          "brazenness",
          "brazenness"
        ]
      ],
      "raw_glosses": [
        "(slang) Shamelessness, cheek, brazenness."
      ],
      "related": [
        {
          "word": "brass-balled"
        },
        {
          "word": "brass neck"
        }
      ],
      "tags": [
        "plural",
        "plural-only",
        "slang"
      ]
    }
  ],
  "word": "brass balls"
}

{
  "derived": [
    {
      "word": "brass ovaries"
    }
  ],
  "head_templates": [
    {
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      "expansion": "brass balls pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "brass-balled"
    },
    {
      "word": "brass neck"
    }
  ],
  "senses": [
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      "examples": [
        {
          "ref": "1986, Tim Kazurinsky, Denise DeClue, About Last Night, spoken by Bernie (Jim Belushi):",
          "text": "You've got a lot of brass balls, you know that. I do all the work, you take all the credit. You know what your problem is? Your face.",
          "type": "quote"
        },
        {
          "ref": "1992, David Mamet, Glengarry Glen Ross, spoken by Blake (Alec Baldwin):",
          "text": "Gentlemen, do you know what it takes to sell real estate? (Picks up a physical pair of brass balls and holds them at groin height.) It takes brass balls to sell real estate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Shamelessness, cheek, brazenness."
      ],
      "links": [
        [
          "Shamelessness",
          "shamelessness"
        ],
        [
          "cheek",
          "cheek"
        ],
        [
          "brazenness",
          "brazenness"
        ]
      ],
      "raw_glosses": [
        "(slang) Shamelessness, cheek, brazenness."
      ],
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        "plural",
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      ]
    }
  ],
  "word": "brass balls"
}