Top Definition
A sudden or prolonged state of sleepyness, which eventually results in a period of sleep (due to one or often several hours of fatigue-inducing self-fornication).
Coach: whats your excuse for today mister?! practice started 30 minutes ago!!

Player: im so sorry Coach Diane, i went home at lunch and got carried away; truth be told i napterbated vigerously for 4 hours straight!

Coach: - You're asking for trouble! Napterbation could cause all kinds of problems, no wonder your late so often!!
by snipeshOkales September 15, 2011

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