When a woman has a violent shuddering orgasm and upon climax accidentally, violently, smacks her elbow into the bedpost, floor, wall, bathtub, cardoor, ect.
Tina got an ultimate funny-bone when her boyfriend rammed her against the wall, screaming Shazam!
The part of the body that your girlfriend or wife possesses that somehow allows her to get offended by something you've said that everyone else in the room finds hilarious.
Wow, that joke that Joe told about the priest, the pianist and the tromboner was great, but his chick is staring daggers at him. He must've hit her So Not Funny Bone.