undertalered 

to un-nut

to kill
Millions of people were undertalered by Hitler.

undertalered by anonymous March 31, 2022

undertaler

A fan of the game Undertale.

I'm an undertaler, too.

undertaler by Dogaahs June 7, 2016

undertaled 

When you look up something mundane, but Undertale-related results come up.

I did a Google Search for spaghetti and got pictures of a skeleton with a scarf
Looks like I've been Undertaled

undertaled by just another random rando July 2, 2017

Undertaled 

When somebody or something does something relating to the 2015 game Undertale.

Me:Oh man, she just straight up Undertaled you!

Undertaled by IceG15464 May 23, 2018