Twitfight 

A situation on twitter where two obviously bored aliens engage in a back and forth war with 140 characters of ammunition, mostly accompanied by revelation of secrets like sex for blackberry bold to mention just a few.

1. @speakyourmindd : twitfight!!!!!!!! Piers Morgan & Sir Sugar are at it again!!

2. There was a twitfight between Rihanna and Ciara again yesterday, Ciara accused her of kpanshing Ray J for a blackberry bold

Twitfight by Maestrodamuz June 9, 2011

twilighting 

That phase of being 1/2 awake & 1/2 asleep; or being so into something that you're completely unaware of your surroundings.

Lots of days I am twilighting & it's an amazing wonderful mystical feeling!

twilighting by Starchylde January 28, 2015

Twilighting 

Overreacting to a somewhat overwhelming situation for the person twilighting, but for others, the situation isn’t that bad. The person tends to overthink, overplan, and hyperventilate.

Friend: Uh, hey, are you doing alright?
Twilighter: Hehe, yeah! I’m doing alright! Just need 7,432 things to do before the big event happens- OH WHO AM I KIDDING I AM NOT OKAY THERE IS SO MUCH TO DO BY TOMORROW!
Friend: Wow, you are twilighting hard.

Twilighting by GpMaR April 9, 2019

Vanilla Twilight 

It's a song, you sex-obsessed idiots! A perfectly innocent Owl City song about a guy who misses his girlfriend (or perhaps even a platonic friend, it isn't clear). Stop trying to turn it into something dirty.

When he uses the term, "Vanilla Twilight", he is literally talking about the color of the sky:

I'll find repose in new ways
Though I haven't slept in two days
'Cause cold nostalgia chills me to the bone
But drenched in vanilla twilight
I'll sit on the front porch all night
Waist deep in thought because when
I think of you I don't feel so alone

Vanilla Twilight by StopMakingEverythingAboutSex July 27, 2018

Twilightlicious 

Twilightlicious is a brony meme originating from a vocal tweet by Tara Strong, the voice actor for Twilight Sparkle (A character in the rather popular My Little Pony: Friendship is Magic universe)
The format is a small rhyme, usually centered around the basic elements of the character (Twilight being the exception, as the fandom typically portrays her as more of a troll)

"I'm the T to the W-I, L-I-G-H-T, and ain't no other pony troll it down like me: I'm Twilightlicious"
Twilight Sparkle

Twilightlicious by undefinedPony October 19, 2012

Twilight Fangirl 

Twilight Fangirls (TFs) are typically young, fanatical female fans of the Twilight series of books/films & may be identified by their Hot Topic Twilight tees. TFs travel in small organized groups, or at Twilight-sanctioned events, in larger unorganized packs. Ear protection is a must for bystanders when more than 10 TFs have gathered. TFs should be approached with caution by non-Twilight fans, and safety guidelines should be followed. NEVER state aloud that you are not a Twilight fan, have never read the book(s), or find 'Breaking Dawn' unrealistic in any way. If threatened, back away slowly & repeat calmly "I read the Isle Esmee chapter 27 times!". TFs' greatest wish is to stalk the set of any Twilight film, or - SQUEE!!! - to meet Robert Pattinson.

Twilight Fangirl #1 "OMG, did you hear Rpattz is on the set in Vancouver?"
Twilight Fangirl #2 "I KNOW! Let's go camp outside his hotel (or the hotel we THINK he's at) for 3 weeks!"
TF #1 & TF #2 "SQUEEEE!!!"

Twilight Fangirl by bikechick August 14, 2009

The Twilight Zone 

There is a fifth dimension beyond that which is known to man. It’s a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow - between science and superstition. And it lies between the pit of man's fears and the summit of of his knowledge. This is the dimension of imagination. It is an area which we call......

The Twilight Zone

The Twilight Zone by GeneralSky November 14, 2016