Why does Ozzy Osbournes hands shake?

Answer 1

He has a very rare desease called parkins syndrome. Its is NOT the same as parkinsons disease. They are only about 5 people known to have this condition in the world. The desease attacks your nerves. It is managable. In order for Ozzy to have gotten this disease both his mother and his father had to carry a rare gene.

Answer 2

It is likely that his "shakes" and slightly "slurred speech" is because of the side effects of medication prescribed by his doctor. This is not at all unusual.