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.
by Everbound Venvel January 25, 2009

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Top Definition
The personification of all hate in the world.
Zeromus feeds on hate.
by Chris Mckerracher November 14, 2003

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