W.D. Gaster

a person that is now named LORE man.

hey W.D. Gaster can i have some ketchu- O_O

by longestnameintheworldlolyeahno March 19, 2021

ganster

a member of a "gan"

by YoungCali August 26, 2003

gayster

Gangsters who turned pink/gay.

OMG Becky, look at his butt, he's a GAYSTER

by What_would_you_do_for_a_klondike_bar June 4, 2004

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"

by Gaster_ May 22, 2022

gavsteroonied

This term refers to those times when you rush a pker with an ags who has vengeance cast on himself, hit him for a large amount of damage, get hit by vengeance, then immediately afterwards get dropped by an ags spec.

"Dude mark rushed this pker with an ags and got gavsteroonied, one hit k0"

by friends from da March 15, 2008

Gasterbator

Someone who likes to fart excessively while masterbating to enhance their pleasure. Usually someone who enjoys anal sex.

Manifold is a gasterbator. He eats lots of beans at least 1 hour beforehand.

by Jeff Gasshole Thompson March 12, 2009

Gaster Sans

Sexiest skeleton ever, resembles W.D. Gaster and loves his kitty cat.

Oh look, that guy is a total Gaster Sans to his girlfriend

by JustAnotherKiller:) October 11, 2016