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(n) a chronic and usually hereditary sleep disorder in which the person affected will suffer spontaneous bouts of sleep (or "sleep attacks") during the day. Symptoms include: extreme sleepiness, typically followed by sleep attacks and last for fifteen minutes; dream-like hallucinations; sleep paralysis, where you cannot move when you start to fall asleep or just after you wake up; and cataplexy, which is an abrupt loss of muscle tone (basically, your muscles "fail you"). The disorder is not fatal, but can be depending on the situation you find yourself having a sleep episode. There is no cure for narcolepsy at the moment.
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