A condition brought about by a long period of writing on paper. It's symptoms largely include forearm pain, aching hands and stiff joints across the writer's arm.
JKR - "I've been writing this new book of mine for about three hours straight, I've got Authorwriteis all through my right arm."
Ketie Price - "Oh I never get Authorwriteis when I write my books,"
JKR - "That's because YOU don't actually write your own material"
Katie Price - "Oh yeah,"