In article , Steve Wertz wrote:
On Sun, 24 Sep 2006 14:44:16 -0600, Mike Avery wrote:

So, evidently butchers think of the shoulder as a butt.

Plain 'ol Pork Butt is the shoulder. Ham is rear butt + rear
thigh/leg. To further confuse matters, the ham is made up of two
sections - the butt end and the shank end. The butt of the ham is
the ass side, of course.

http://www.hormel.com/templates/knowledge/knowledge.asp?catitemid=31&id=158

Steve -- So aptly put!