An Undertale

A piece of media that is popular enough for fans to reference it constantly but not popular enough for everybody to understand it

Fred: Dude, you know nothing, do you?
Dean: You know nothing Jon Snow.
Fred: I haven't watched Game of Thrones yet. Stop referencing it. It's an Undertale

by Kawaiicorn October 12, 2016

An Undertale Fan

Someone you should never associate yourself with.

Nobody:
Literally Nobody:
An Undertale Fan:
Everyone Else: ;-;

by SarcasticSackO'Crap May 29, 2019

Vexed is an understatement

When something has really cheesed you off!

“Did you get that horrible snapchat update?”
“Yes, and vexed is an understatement.”

by Flat 83 April 15, 2018