Definition of crazy bone in English:

crazy bone

noun

US
  • another term for funny bone
    • ‘All the nerves were torn in the elbow, right where the crazy bone is located.’
    • ‘The term funny bone (also once called the crazy bone) seems to have arisen out of a pun.’
    • ‘I was even more perplexed when I learned from my dictionary that crazy bone also has the metaphoric meaning of ‘a sense of humor.’’

Pronunciation:

crazy bone

/ˈkrāzē bōn/