"glass arm" meaning in English

{
  "forms": [
    {
      "form": "glass arms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "glass arm (plural glass arms)",
      "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",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1926, Radio Broadcast, volume 9, page 57:",
          "text": "If he were to use his fingers instead of his wrist, he would soon have telegrapher's paralysis or a “glass arm,\" in the lingo of the radio cabin.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stiff arm resulting from a long session of CB radio operation."
      ],
      "id": "en-glass_arm-en-noun-S7fAMxmR",
      "links": [
        [
          "stiff",
          "stiff"
        ],
        [
          "CB radio",
          "CB radio"
        ]
      ],
      "raw_glosses": [
        "(slang) A stiff arm resulting from a long session of CB radio operation."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "glass arm"
}

{
  "forms": [
    {
      "form": "glass arms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "glass arm (plural glass arms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1926, Radio Broadcast, volume 9, page 57:",
          "text": "If he were to use his fingers instead of his wrist, he would soon have telegrapher's paralysis or a “glass arm,\" in the lingo of the radio cabin.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A stiff arm resulting from a long session of CB radio operation."
      ],
      "links": [
        [
          "stiff",
          "stiff"
        ],
        [
          "CB radio",
          "CB radio"
        ]
      ],
      "raw_glosses": [
        "(slang) A stiff arm resulting from a long session of CB radio operation."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "glass arm"
}