The Undertale effect 

Once something popular releases, the community and any content made about it WILL degrade and become worse overtime.

"hey have you noticed the twitter community on welcome home keeps getting worse?"
"That, my good friend is the undertale effect happening in practice"

The Undertale effect by AmnesiaPen May 6, 2023

The Underbaker 

The guy at the crematorium who doesn't turn the heat up high enough.

Joe was fired from the crematorium because he didn't turn the heat up high enough and Mr. Jones was a little under cooked. Therefore making Joe the underbaker.

The Underbaker by The moogler April 15, 2014

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

The Undertale Effect by Saltcult February 9, 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.

The-Undertale-Community epidemic by burgerkingassletuce December 4, 2019

The Undertale Multiverse 

The biggest part of the fun earthbound multiverse. It is a multiverse within an other multiverse since it contains many alternate realities with different worlds.

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The undertale multiverse is so much big.
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The Undertale Multiverse by Retardost December 13, 2021

The Underwater Splits 

when you are forced to watch someone doing the under water splits over and over again until you almost drown

I'm not going to Johnny's house again. I can't watch any more of The Underwater Splits.

The Underwater Splits by Lorraine Haul May 21, 2024

Undertale the Musical 

The greatest music video to ever exist, nobody understands its true beauty, even the people who love it. It is a gift to us from god/LHUGUENY

I just watched Undertale the musical, it's the best thing ive ever seen!

Undertale the Musical by CooingSlinky11 October 19, 2021