Omegalomaniac 

From the last Fall Out Boy single before their undefined hiatus, Alpha Dog. It goes with the word "megalomaniac," which is basically thinking your the shit, with the o added on the front so it looks like "omega" (To go with Alpha Dog). It's actually quite a good song.

Alpha dog and o-o-omegalomaniac

Omegalomaniac by tell rock&roll im alone again November 16, 2010

megalomaniac 

1. A psychopathological condition characterized by delusional fantasies of wealth, power, or omnipotence.
2. An obsession with grandiose or extravagant things or actions.

For example, Prince Naseem.

megalomaniac by Rowen September 12, 2004

Megalomaniac of Doom 

A megalomaniac such a megalomaniac that they become a Megalomaniac of Doom. (Capital letters are required.)

Jeff is a power hungry Megalomaniac of Doom.

Megalomaniac of Doom by Megalomaniac Of Idiosyncrasies February 15, 2020

megalomaniac 

A person needs complete control over everything such as a world or a timeline

Sans: woah chara is a megalomaniac

megalomaniac by Rosey221 June 27, 2017

Megalomaniac 

a melomaniac who is constantly listening to megalovania (I don't know how to spell it, I haven't played undertale in a long time)

*megalovania plays*
*Megalomaniac mode activated*

Megalomaniac by ♥🗺☠ March 1, 2021

Megalomaniac 

A megalomaniac is a self-centered, power-crazed egomaniac that is obsessed with their goals for conquering cities and countries and world domination, they're rather over-obsessed with power rather than actual conquest. They also often fantasize of greatness, fame, wealth, grandeur, omnipotence predominate and servitude. Because of all the power driving them to becoming critically insane their minds are separated from reality since they also don't care what happens to anything at all as they care about themselves.

Despite having the word maniac in the name of them being a megalomaniac, it does not mean they are always clinically insane.

People in the second group have a slight case of megalomania. And yet they are obsessed with world domination as on their record they was labeled a megalomaniac

Megalomaniac by Superweapon221 September 3, 2013

Megalomaniac 

1)A person obsessed with greed and/or power.
2)A great song from one of the greatest bands in the world; Incubus

I saw Incubus perform "Megalomaniac" live at the All-State Arena on July 14, 2004

Sadaam Hussein was a megalomaniac

Megalomaniac by Dennis October 22, 2004