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

Vanilla Twilight 

The substance that comes out of a male reproductive organ. Usually shot on and around a girls face.

Dude that girl was drenched in vanilla twilight last night after getting with that guy

Vanilla Twilight by WhiskerBiscuit3691 August 30, 2009

Vanilla Twilight 

When someone is sleeping, a male ejaculates on the eyes of the sleeping person. So when they wake up their eyes are sticky and white.

Girl 1: "I couldn't see anything when I woke up this morning next to Bob."

Girl 2: "Oh no! Bob must have given' you a Vanilla Twilight!"

Vanilla Twilight by Moose Raper.. August 25, 2010