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

Prom effect

An effect in which feelings and emotions are erected due to the party atmosphere attached to prom

The prom effect has really boosted my ego.

by Kansas Redblum April 10, 2022

Doggler Effect

When you see a man or woman from a distance and they look attractive, but as they walk closer to you they get uglier and uglier.

Wow, that girl looked great when I saw her about 100 feet away. But when she same closer she looked like a swamp creature. That's the doggler effect for you!

by FuckingFemaleLeatherface June 6, 2023

Kanye Effect

When someone has been affected deeply by a parent's death.

(Their entire behavior has been altered and they're probably an addict of some sort)
Bob: My father has been deeply affected by his moms death
Bobby: Yea that's the Kanye Effect
Bob: Wtf is that?
Bobby: check urban dictionary ;)

by idklolIlikefunnyhahas November 16, 2023

Keith Lee Effect

When a restaurant becomes extremely successful after Keith Lee himself tries the food and rates it 1-10 on TikTok.

Man, waiting in line at BJ’s restaurant is wild. It’s got that Keith Lee effect.

by anonymous March 19, 2023

Pennyroyal Effect

When a transwoman's gender dysphoria causes her to slip into TERF or conservative mode regarding the womb - anti abortion, putting pregnant women and gestational mothers on pedestals.

I just think if you've got it, why WOULDN'T you use it
Girl, thats the pennyroyal effect, miss me with that shit

by bear&bird May 27, 2023

Hall Effect

An effect often observed in school hallways. The hall effect is the effect of loud conversations in small spaces. In order to be heard over the chaos, conversations become louder and louder, driving up the overall level of noise. This causes conversations to become louder, eventually preventing conversation at all and transforming language into meaningless babble.

The hall effect caused our eardrums to rupture.

by Sweet Soundie September 23, 2025