narwhalcolepsy Share definition Flag A sleep disorder that causes excessive sleepiness and frequent daytime sleep attacks when watching narwhals on television. I was watching Human Planet and had total narwhalcolepsy during the Artic episode. narwhalcolepsy by oliverwest May 22, 2012 0 0 Get merch Get the narwhalcolepsy mug. Buy Now — $32.95 See more merch