A disease transmitted electronically that affects, almost exclusively, young, immature females. It is characterized by repetition of (usually) the last letter of random words in a message, as if the infected does not have good motor control. Most often seen in texts and on Facebook.
Girl: "omggg i saw Justin Bieberrrrrrrr!!! (:"
Guy: "It looks like you have Keyboard Parkinson's, you should get that checked out."
Keyboard ravers are people who all tune into the same music and then discuss on facebook how the banging trance is, they jump on their beds and bang their heads.
They are the ultimate misbehavers disturbing the neighbours. They get messy with nessy.
They are in-sitting in!
Getting tranced out their puss!
They are in-tuned in!
When suddenly everybody wants to play with a toy or item (like a keyboard) that has been buried under the bed or tucked away in a closet for years.
Raul: I found this keyboard under the bed. I'm gonna learn how to play the Star Wars theme on it.
Brock: Hey! Gimme that! It's mine!!!
Raul: It's been collecting dust under the bed for 5 years and now suddenly you want to play it? That's Keyboard Theory.