By whip I mean knuckles. Or neck. Or back. What body parts of yours can you crack/pop? I can get all of my fingers on the bottom knuckle joint, and all the ones on my right hand on the top joint as well. Isn't it fun? I feel really on edge until I've cracked them all if I ever get the urge. Then you have weird people all around you who get offended at joint cracking Discuss this most noble of pastimes!