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1.
A disease consisting of frequent, acute bouts of sleeping, snoozing, or napping, often at inappropriate times (driving, working, in the middle of the day...). Napiliepsy has no cure.

Napileptic: of or pertaining to napilepsy.
It is always difficult for me to drive somewhere. Around 30 minutes into the trip, I have a napileptic fit.

We were extremely late to dinner because of our napilepsy
by valpalas December 25, 2010