funny bone

WordReference Random House Learner's Dictionary of American English © 2026

ˈfun•ny ˌbone, n. [countable]

1. Anatomy the part of the elbow where a blow to the nerve causes a peculiar tingling sensation in the arm and hand.
2. a sense of humor.

WordReference Random House Unabridged Dictionary of American English © 2026

fun′ny bone′, 

1. Anatomy the part of the elbow where the ulnar nerve passes by the internal condyle of the humerus, which when struck causes a peculiar, tingling sensation in the arm and hand;
   crazy bone.
2. a sense of humor.
• 1830–40

Collins Concise English Dictionary © HarperCollins Publishers::

funny bone noun

1. the area near the elbow where the ulnar nerve is close to the surface of the skin: when it is struck, a sharp tingling sensation is experienced along the forearm and hand