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.
Another nocturnal transmission!?! I can't believe I have to clean up this mess again!
by AFDV December 18, 2010
Get the Nocturnal transmission mug.
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.
by Catlover145 June 24, 2017
Get the Universal Nocturnal Blindness Disease mug.
People that stay up till 4 in the morning binge watching and obsessing over something, and are usually most active at night
"Kathy stays up all night, every night. She's so nocturnal."
by SomethingElseNoOneCameUpWith February 24, 2019
Get the Nocturnal mug.
When your awake during the night and sleeping during the day.
"Damn - why is Olivia always crying on the floor eating Fruity pebbles at 4am but always sleeping during her exams?"

"Idk man, maybe she's NOCTURNAL!"
by i_love_my_hommie_jesus May 31, 2018
Get the Nocturnal mug.
When your boy dare you to send a dick pic so you stick the Snapchat cam in your pants and your hoe don't know.
"Boy, last night I pulled a Nocturnal Cobra on my bitch."
by Fupa Friend February 27, 2016
Get the Nocturnal Cobra mug.