Zeromus 

The personification of all hate in the world.

Zeromus feeds on hate.

Zeromus by Chris Mckerracher November 14, 2003

Zeromus 

The Final Boss of Final Fantasy IV. He/it/they is/are the incarnation of hatred, risen from the corpse of Zemus. At first he/it/they appears as a blue, ghost-like entity, but transforms in to a hideous monstrosity, complete with hideous monster wang, in the final battle. His/its/their favorite attack is Big Bang, and that's terrible.

Zeromus returns as a summon in Final Fantasy XII and Final Fantasy Tactics A2.

During the battle with Zeromus, you need Rosa to heal your party after every Big Bang attack, or you'll wind up with a game over.

Zeromus by Everbound Venvel January 25, 2009

Zeromaster

A person who is always consistently wrong.

When you ask a Zeromaster if a movie is good, and they say "no", then you know that it is a good movie.

Zeromaster by Flagonslayer December 20, 2008