untergangers 

A large group of people who make parodies and spoofs about Hitler, typically associated with The Original Bunker Scene from the 2004 German Language Film Der Untergang.

Some notable Untergangers are HRP, Delphox, and FegeleinTheLostTapes, to name a few.

Bob and Mary make Hitler Parodies on YouTube, they're Untergangers.
I've had enough of these Untergangers.

untergangers by Rhaegar Targaryen May 13, 2017

untergangers 

A group of people who make Downfall Parodies, but who have bullied other Untergangers and even doxed Hitler Rants Parodies, the biggest known creator of Downfall Parodies.

Untergangers make Downfall Parodies.

untergangers by Unterganger October 9, 2020

Underbangers 

A female or woman's underbottoms

We're in for underbangers

Underbangers by Cnote the crow November 16, 2021