Noun: A disease similar to Parkinsons, named after Mark G, from Westcliff in Essex. The disease is characterised by boughts of idiocy; an inability to focus; clumsiness; things breaking from the other side of the room; not knowing when it's your turn in Risk. Potentially fatal if not treated.
Often found in combination with Markolepsy after consumption of Markotics
Markinsons disease is a disorder of the brain that leads to shaking/tremors while trying to record your friendskilling it on a skateboard.
Ace: Damn Mitch that's the last time we're taking you filming!
Mitch: WTF, Why, What did I do?
Ace: You can't keep the camera steady to save your life.
Mitch: My bad dude, I was just diagnosed with Markinsons disease :(