Whenever a male is sexually aroused during the night and wants to masturbate but is too lazy or scared that he will wake his parents up when he moves to get tissues. He then masturbates with the intention of not nutting but ends up losing control and overestimating his choad causing him to nut all over himself. This putts him in a much worse situation than before by forcing him to get up and clean it and also risk being caught by his parents with the task of explaining why he has nut all over himself. Basically, a literal fucking nightmare come true.
"Dude, did you hear about what happened to Andrew and why he's not at school today? I heard that he had The Nocturnal Nut of Nightmares and his mom caught him bro!"
by The Keeper of Knowledge69 June 13, 2018

Email or other electronic communication sent overnight which catches the recipient by surprise, sometimes by the impact of the transmission, when discovered the following morning.
by AFDV December 19, 2010

Male's and Female's comfortable with night time hour's based on sensitivity to ultra violet light because of neurological natural enhanced nerves for night time. An nocturnal human species.
by SunArt July 29, 2019

The bizzare phenomena in which a person's mind becomes more explorative, creative, or thoughtful at night, ultimately leading to an increased amount of productivity not observed during daylight hours.
by bleedoutlay August 9, 2025

People that stay up till 4 in the morning binge watching and obsessing over something, and are usually most active at night
by SomethingElseNoOneCameUpWith February 24, 2019

Definition:
Nocturnal Shopping is The act of spending money while wide awake at night—usually during episodes of insomnia—when you should be sleeping, journaling, or praying. Often accompanied by deep regret and Amazon, Walmart, or Macy's email confirmations. (The behavior of browsing or purchasing items online in the late-night or early-morning hours instead of resting, commonly justified as harmless but often leads to unexpected credit card charges and impulsive buys.)
Nocturnal Shopping is The act of spending money while wide awake at night—usually during episodes of insomnia—when you should be sleeping, journaling, or praying. Often accompanied by deep regret and Amazon, Walmart, or Macy's email confirmations. (The behavior of browsing or purchasing items online in the late-night or early-morning hours instead of resting, commonly justified as harmless but often leads to unexpected credit card charges and impulsive buys.)
J said to her accountant,"I could’ve saved hundreds of dollars if I had just gone to sleep instead of nocturnal shopping™.” (Jamera and Art) JamArt Taking the Step Out
by JamArt ~Taking The Step Out July 22, 2025

A case of one or many people at once suffering from blindness for a night but have no recollection of said blindness. Often times, memories are suppressed and replaced with images that could never in a million years be true.
Babe, why did you send a nude to my best friend last night?
I didn't babe, you're just suffering from Universal Nocturnal Blindness Disease.
I didn't babe, you're just suffering from Universal Nocturnal Blindness Disease.
by Catlover145 June 24, 2017
