Nope, it's not parkinsons, it's anti-phsycotic drugs making him like that, and he'll tell you so in interviews if asked. I know about that stuff anyhow because my father is scizophrnic and takes meds that make him act the exact same way.
<< <<"I'm the prince of f***ing darkness, i cant have f***ing bubbles!" >>
I think he also said "What the f*** is evil about bubbles!?"
<<And Ozzy seemed a lot more fluid, even five or six years ago. He wasn't always staring at the ground and walking like a zombie. Don't know if it was the camera or his health. He always seems to light up when fans and cameras are around, so that may have been part of it.>>
My professional guess would be parkinsons. He has all the textbook signs, stiffness in the neck, shuffling walk, slow movements, shaking hands, etc. The first time I saw the show I thought "OMG, Ozzie has parkinsons!"
Could be something related to drug use over the years that mimics parkinsons, but I have never heard of such a condition. >>