Megalovania 

Megalovania is the song that plays when you fight Sans. The final boss of the Genocide Route of Undertale. The word means the feeling of sins crawling on your back.

I just committed all 7 deadly sins. I have Megalovania.

Megalovania by Racer27 January 24, 2017

MAGAlomaniac 

An American that is so obsessed with Donald J. Trump that they actually think that he was a good president and won the election in 2020.

I wish that MAGAlomaniac would wear his mask so this pandemic could get under control.

MAGAlomaniac by MakeAmericaReasonableAgain November 26, 2020

Melomaniac 

Someone who has an extreme love for music.
Someone who is almost addicted to music

Do you know the girl who always listens to music? She's a Melomaniac.

Melomaniac by _BaccoX December 22, 2020

Metalmaniacal 

A term used to describe someone who is completely and utterly obsessed with heavy metal.

You are metalmaniacal because you took the time to alphabatize every band you listen to!

Metalmaniacal by Ryan Luchsinger July 31, 2008

Megalovania 

sans

sans Megalovania

Megalovania by notessayharperipromise January 12, 2022

megalomania 

a psychopathological disorder resulting from delusions of magnificence, grandeur, or omnipotent power -- usually, but not limited in the interests of money or other wealth.

(1) Adolf Hitler

(2) Saddam Hussein

(3) Osama BinLaden

megalomania by Postman January 13, 2005