When you cant Skate for any reason, over a long period of time(rain, grounded, snapped deck, etc.) . Effects of Skate Deprivation are emptiness, extreme boredom, insomnia, running around like a crazy person, and in some cases depression.
Awesome skater guy: "I haven't been able to skate for a month, and I cant sleep at night"
Bad ass skate guru: "You must have Skate deprivation."