Nightbat 

A chill dude on twitter who plays roblox and makes everyone laugh. (@nightbat152)

Me: Hey, have you followed @nightbat152 on twitter yet?
Guy: No
Me: you son of a bird, follow him right now >:(

Nightbat by YourToeSmells December 26, 2021

nightcat 

A method of keeping your head warm on cold nights, by allowing your cat to curl up on your pillow, the back of your neck, or your head itself.

Buddy: It was really cold last night, wasn't it?
Me: I dunno about *you*, but *I* was super cozy with my quilt and nightcat. He purred me to sleep, too!

nightcat by KalliJ December 10, 2010

Nightrat 

A fan of th@ kid. A true scholar. Knows good music! is up.all.night. listening to th@ kid music.

your a true nightrat/scholar, listening to th@ kid all night.

Nightrat by that nightrat July 19, 2011

nightwatchman 

A shite that has been left in the pan overnight (either accidentally, or on purpose) that turns the water brown, and quite frankly, smells horrific for the first visitor of the day.

Fucking hell Frank, some bastard has left a nightwatchman in trap 3 - it nearly put me off my morning shite.

nightwatchman by John Kebab September 5, 2010

Nightbutt 

A term used to describe Nightbot on streaming platforms like Twitch. When this chat bot behaves in a way that is unintended or becomes irritating at times during live streams, the bot's name quickly becomes Nightbutt. Aside from being a butt once in a while, it's a solid tool for live streamers by providing a wide range of features for moderation, automation, and entertainment.

Oh, come on, Nightbutt, you're acting up again. Nightbutt, why are you being mean to Bob? Bob's just trying to use some emotes in the chat.

Nightbutt by BlameNick September 11, 2018

nightbane 

Last boss in the world of warcraft instance Kazaran requires level 70.

nightbane dropped staff of everliveing liveing last night.

nightbane by morwin/thallion April 2, 2007

Nightball

An eightball consumed before going to bed by someone who has the ability to go to bed after an eightball. If said person does not have the tolerance to go to sleep, the consumption does not constitute a nightball.

My friend Robyn suggested I do a nightball to soothe my nerves.

Nightball by Jewbacchus August 5, 2007