Gaster Effect

The Gaster Effect (Undertale term) is when a person mistakenly links anything slightly mysterious, or anything slightly resembling Gaster (leitmotifs, font or face) relating to Undertale or Deltarune, to the character W.D. Gaster, even if it is very hard. This is usually because Gaster is very mysterious and of a certain significance to said games' lore. In most cases, relating things to Gaster is not appropriate for the situation and/or possibly misleading.

A: Woah that new Deltarune song has Gaster's Theme playing at 0:44! If you listen to the piano...
B: Those are just arpeggios. You've got the Gaster Effect

by Stratollera April 15, 2024

Gathering, gathEring, gatherinG

Gathering, gathEring, gatherinG

Gathering, gathEring, gatherinG

by ExeeloguiexE April 16, 2025

gather

another way of saying you’ve gagged someone, or perhaps humbled them.

Mom: You could’ve dressed nicer for the occasion hun…
Daughter: No need for a quick gather babe, today’s laundry day.

by chiiaki nanami February 14, 2026

Gasterbating

A term that is commonly used among gooners, where you are gaslighting people online with false information or 10/10 ragebait and pleasuring yourself to their reactions. This is commonly used in social media platforms such as reddit, twitter (mainly), and instagram.

Peak gasterbaters have content farms with bots sending 100s of false information on post, or just normies that just want people to rage.

Hey tommy i tried gasterbating last night. i gasterbated so hard the furry on twitter killed themselves can you believe that?! i nutted so hard on my computer screen when i found out.

by ABuildingOnFire June 17, 2025

Gasterbating

masturbation to or sexual attraction to the character W.D. Gaster from Undertale

does W.D. Gaster have any results on rule 34?

damn it now i'm Gasterbating

by chronic gooner June 18, 2025

Gaster

A mysterious figure talked about in the game UNDERTALE made by Toby Fox through entities called "Gaster Followers". Gaster Followers can only be obtained through getting certain numbers on an RNG system called "FUN value." The Gaster Followers will hint at what Gaster was and what he did. A hallway can appear in the Waterfall area if you have a FUN value of 66, but there is a 10% chance while have FUN value 66 that a mysterious door will appear. An entity is spotted when going through the door. It is highly speculated that this person might be Gaster, as when you interact with him, he plays a sped up and reversed version of Gaster's Theme

"Gaster? Who is that? I've never heard someone with that name before.."

by personusingtheurbandictionary September 6, 2025

Gaster

A man who listens

But rarely speaks

Susie: Oh my full name? It's Susie Gaster-
Once upon a time, a LEGEND was whispered among shadows.
It was a LEGEND of HOPE.
It was a LEGEND of DREAMS.
It was a LEGEND of LIGHT.
It was a LEGEND of DARK.
This is the legend of DELTA RUNE
For millenia, LIGHT and DARK have lived in balance,
Bringing peace to the WORLD.
But if this harmony were to shatter...
a terrible calamity would occur.
The sky will run black with terror
And the land will crack with fear.
Then, her heart pounding...
The EARTH will draw her final breath.
Only then, shining with hope...
Three HEROES appear at WORLDS' edge.
A HUMAN,
A MONSTER,
And a PRINCE FROM THE DARK.
Only they can seal the fountains
And banish the ANGEL'S HEAVEN.
Only then will balance be restored,
And the WORLD saved from destruction.
Today, the FOUNTAIN OF DARKNESS-
The geyser that gives this land form-
Stands tall at the center of the kingdom.
But recently, another fountain has appeared on the horizon...
And with it, the balance of LIGHT and DARK begins to shift...
DELTARUNE

by Bonkaaaaaaaaaaaaaaaaaaaaaa December 9, 2025