Gaster 

Nightmare fuel

I know he isn't that scary, but Gaster's been haunting my nightmares since 2015.

Gaster by HotHotLegg April 11, 2020

gaster 

It's a secret!
But no seriously, Gaster is a secret character from the game UNDERTALE. Said to be Sans and Papyrus' dad. Well, it's not confirmed, but he may be. He speaks in WingDings too.

Undertale Fan: I FOUND THE SECRET GASTER!!!

gaster by SkyBerry June 5, 2016

Gaster 

The skeleton of a dragon.

When a dragon is killed it becomes a gaster.

Gaster by Desipida February 13, 2020

gaster 

A hot tall skeleton dad whom has fell in the core, he's so fucking tall that he has bend through doorways. He's the the most mysterious person you've ever met, and he doesn't fucking play around. 🙄

Person 1: wow you're tall, almost GASTER like.
Person 2: I know

gaster by Woozieroo May 12, 2016

Gaster 

a skeleton guy from glitchtale who is really volatile and angry most of the time.

what do you think of Gaster?
"Yeah, He really needs to chill."

Gaster by emperorbelos April 7, 2022

Gaster 

beware of this guy. Any phrase could be used to create a meme, it won't leave you alone, it won't stop at nothing. No, it can't be stopped, just one breath from you could trigger it

Gaster :"Sono dietro di te"
X :"NOOO LASCIAMI"

Gaster by Gaster_ May 22, 2022

Gaster 

A Skeleton Who Is On Discord Alot

Guy1 : That Guy Is A Gaster
Guy2 : Whats That
Guy1 : Someone Who Is On Discord Alot
Guy2 : Then He Is A Big Gaster

Gaster by Gaster. May 16, 2018