Medical condition of the neck resulting from prolonged periods of extreme headbanging. Symptoms include the inability to turn your head, extreme pain when nodding and occasional bleeding from the neck. Can result in surgery. Named after the first true victim, Jon Schaffer of Iced Earth
I think that Iced Earth gig gave me a bad case of Schaffer Neck.
My health insurance claim was denied because they said Schaffer Neck was a pre-existing condition.