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1. fap nap
The nap you take after you get done stroking it.
Man I was exhausted after that marathon jerk...I had to take a fap nap.
2. Fap Nap
After self or mutual masturbation (fap), one takes a voluntary or accidental nap.
Sorry I'm late for the presentation of the Metropolitan Museum of Art's $6.9 million dollar addition for Modern Art and Media Communication, I had an awesome wank and really needed a fap nap.
3. fap nap
1. Telling your roommate you are going to take a nap, but then going in and jerking off instead.
D: Man I'm so tired right now, I gotta take a nap. <Closes door>

Q (roommate): Bull shit man I know you are just going to take a fap nap.

D: No dude I'm really tired fuck you!