The Undertale Effect

By listening to undertale ost's your vrt increases by 100% causing you to get good kovaak's scores. Often people confuse it with 𝓪𝓲𝓶𝓫𝓸𝓽*.

*𝓪𝓲𝓶𝓫𝓸𝓽- a bot that aims.

Me: oh you got a good score on arc dodge switch?
My friend: yeah i used the undertale effect.
Me: oh that makes sense now

by Saltcult February 9, 2021

Playing Undertale

Playing undertale is a term used for a form of homosexual intercourse, in which the dominant male forces their hand fully into the "underground", another term for the other mans asshole.

Hey man, we're playing undertale tonight.

by ReimuSEES February 14, 2021

Undertale Fandom Syndrome

Undertale Fandom Syndrome(UFS), is a horrible disease that is founded in major fandoms. First discovered in 2014, it was created in its first stage with the FNAF fandom. It horribly spread when undertale became popular. Common symptoms include: comic dubs, weird fetish art, and annoying obnoxious children/preteens. Unfortunately, UFS has became a parasite that is sent to feed off hosts and cannot be treated or cured. The following fandoms that suffered the same fate include but not excluded: FNAF, Undertale, Cuphead, Bendy and the Ink Machine, Hazbin Hotel, and recently, Friday Night Funkin'.

Person: yo dude have you seen this game called Friday Night Funkin'?
Another person: yeah man that shit is really great!
Person: yeah it is, unfortunately the FNF fandom is making Pico x BF yaoi.
Another person: shit! Another game fell into Undertale Fandom Syndrome

by professionalgamer March 20, 2021

Undertale-main theme

*what a nice song about 2 children dying! it fills you with detemmienation.

your non-existent friend: have listen to the Undertale-main theme
you:yes i have, it's a really nice song about 2 children dying! =)
your non-existent friend: yeah it is!

by Ushi.Gushy.farmer.boi May 21, 2021

Twitter femboy Undertale

A quote originating from the steam reviews of the game "Omori" describe it as such. Thus the name Twitter femboy Undertale is a second, non official name for Omori.

Person 1: "Ayo have you played Omori? Better not have."
Person 2: "You mean Twitter femboy Undertale?"

by SuburbanSociopath November 1, 2021

Undertale last breath

it is basically the undertale sans fight but 10000 times more hell

Person 1: Hey have you finished the sans fight
Person: No, but I have finished Undertale last breath
Person 1: IMPOSSIBLE IT IS TOO HARD TO BEAT

by reaper sanesss December 28, 2021

The-Undertale-Community epidemic

An epidemic were a majority of the Community for an RPG game are Disgusting, cringy, porn/rule 34-making type users. This term originated from the RPG 𝘜𝘯𝘥𝘦𝘳𝘵𝘢𝘭𝘦 which has a community that would make Leafy (leafyishere) cry. Other games have been struck with this issue such as 𝘉𝘢𝘭𝘥𝘪'𝘴 𝘣𝘢𝘴𝘪𝘤𝘴 𝘦𝘥𝘶𝘤𝘢𝘵𝘪𝘰𝘯 𝘢𝘯𝘥 𝘭𝘦𝘢𝘳𝘯𝘪𝘯𝘨
, 𝘋𝘦𝘭𝘵𝘢𝘳𝘶𝘯𝘦
(made by the same main creator of Undertale, Toby fox) FNAF 1-∞ (Cause geez that series put me in a spiral when I was a scrub) 𝘉𝘦𝘯𝘥𝘺 𝘢𝘯𝘥 𝘵𝘩𝘦 𝘐𝘯𝘬 𝘮𝘢𝘤𝘩𝘪𝘯𝘦, 𝘵𝘢𝘵𝘵𝘭𝘦𝘵𝘢𝘪𝘭 And much more to come... Yeah, it's not over.

Dev A: Guys I really want to publish this RPG game but I don't want to get struck by The-Undertale-Community epidemic

Dev B: Kids nowadays...... back in my day the Community & fandom was the best, God damn 2007-2008 Borns!!!!

Dev C: Im never have kids till this epidemic clears up; basically I'm never gonna be a father ;-;

Grandpa: In my days the media didn't have all this crap

Dev Grandson: Ok boomer.

NOTIFICATION mrbeast pays pregnant women 20,000$ to make them a console gamer to prevent The-Undertale-Community epidemic.

by burgerkingassletuce December 5, 2019