"crazy bone" meaning in English

{
  "forms": [
    {
      "form": "crazy bones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crazy bone (plural crazy bones)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1830, Mrs. John Farrar, The Children's Robinson Crusoe, page 318",
          "text": "I have seen a person in England, who had touched a torpedo; and he said the shock it gave him, was like striking that tender part of the elbow, which we call the crazy bone, very hard indeed;",
          "type": "quotation"
        },
        {
          "ref": "2008, Thomas S. Purtell, Natural Martial Arts, page 34",
          "text": "My hand was at his elbow, my fingers just at the indentation of his elbow, just about where you bump the nerve point everyone calls the “crazy-bone”.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The funny bone; the ulnar nerve in the elbow."
      ],
      "id": "en-crazy_bone-en-noun-5Oioe296",
      "links": [
        [
          "funny bone",
          "funny bone"
        ],
        [
          "ulnar",
          "ulnar"
        ],
        [
          "nerve",
          "nerve"
        ],
        [
          "elbow",
          "elbow"
        ]
      ]
    }
  ],
  "word": "crazy bone"
}

{
  "forms": [
    {
      "form": "crazy bones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "crazy bone (plural crazy bones)",
      "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 terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1830, Mrs. John Farrar, The Children's Robinson Crusoe, page 318",
          "text": "I have seen a person in England, who had touched a torpedo; and he said the shock it gave him, was like striking that tender part of the elbow, which we call the crazy bone, very hard indeed;",
          "type": "quotation"
        },
        {
          "ref": "2008, Thomas S. Purtell, Natural Martial Arts, page 34",
          "text": "My hand was at his elbow, my fingers just at the indentation of his elbow, just about where you bump the nerve point everyone calls the “crazy-bone”.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "The funny bone; the ulnar nerve in the elbow."
      ],
      "links": [
        [
          "funny bone",
          "funny bone"
        ],
        [
          "ulnar",
          "ulnar"
        ],
        [
          "nerve",
          "nerve"
        ],
        [
          "elbow",
          "elbow"
        ]
      ]
    }
  ],
  "word": "crazy bone"
}