Nightling

Lightning that strikes at night.

In the dark, a flash of nightling lit up the skies around me.

Nightling by Mohit Hira February 6, 2009

Nightingale 

No nightingales

Listen do you hear that ?
I don’t hear anything

That’s the point….no nightingales

Blah blah

*every*

Nightingale by LlamaUrMother September 7, 2023

Nightlight 

Mankinds only defense against the evil monsters of the night. If you don't have one, your days are numbered.

Nightlight, could we survive without you?

Nightlight by MaximumOverdrive February 22, 2009

Nightwing 

The original Robin, also known as Dick Grayson.
Quite possibly the coolest part of the Batman everything.
Nightwing is a badass mofo with long black hair and ninja moves. Very shweet!

Dude 1: Dude! Batman is on! Let's watch!

Dude 2: Is it the one with Nightwing?!?

Dude 1:...No.

Dude 2: Well fuck that then!

Nightwing by Josh-o-matic December 16, 2008

Nightingale syndrome 

The Florence Nightingale effect is a situation where a caregiver develops romantic feelings for their patient. Many often misunderstand the term to mean the opposite; that is, a patient falling in love with the caregiver as a result of interpreting an amiable bedside manner as affection.

See Florence_Nightingale_effect on Wikipedia, often confused with Nightingale syndrome (which is something else entirely).

Nightingale syndrome by Walkman100 January 19, 2016

Nightlite 

When you stretch your nut sack and shine a flashlight through it with the lights off.

She said she stubbed her toe on the bed because it was dark, so I gave her the nightlite.

Nightlite by Flames Newsman July 29, 2020

Nightlight 

A tool commonly used by children under the age of 8 to scare the piss out of the boogeyman as he creeps out of the closet. Causes burning of the scalp, eyes, and genitals.

John's nightlight really helped him get to sleep.

Nightlight by Kyleddeck August 27, 2008