Masturbating just before sleeping. Similar to the way a
nightcap can help you relax and unwind at the end of the day before sleeping. Common in young males that have high testosterone levels and need a way to shoot off some steam. Can also be useful in situations of extreme horniness making you unable to
sleep.
"I was way too stressed to
sleep, so I had a nightfap and slept like a baby."
"Man I was hanging around
Julia all day, so I was way too horny to
sleep. Nightfap solved it."