"Bull pizzles are almost exclusively used/produced today as chewing treats for dogs. The pizzles of bulls are cleaned, stretched, twisted and then dried at a very high heat. The result is a very hard, 80-100 cm long brown stick, which is then sawed into pieces appropriate for the size of the dog, usually 10-20 cm (this process also makes its anatomical origin rather unrecognizable)."
- Wikipedia, April 2008.
Also: 'a flogging instrument made from a bull's penis'.