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The Evil Queen Pulsating, Bloated, Festering, Sweaty, Pus-filled, Malformed, Slug-for-a-Butt, (Queen Slug-for-a-Butt for short) is the final foe that Jim faces in the video game Earthworm Jim. She is the twin sister of Princess What's-Her-Name, though clearly failing to resemble her in any way. Queen Slug-for-a-Butt closely resembles a large queen insect, especially a queen termite.
Slug-for-a-Butt was planning on using the "Ultra-high-tech-indestructible-super-space-cyber-suit" to conquer the universe (the fact she once fit in the suit is a marvel). Thus, she intends to destroy Jim, and reclaim the suit. She is the boss of Buttville, the final level, and the player must first defeat her butt before fighting the Queen herself. She later was the penultimate boss in Earthworm Jim: Menace 2 the Galaxy.
In the Earthworm Jim television series the Queen is ruler of the planet Insectika and is voiced by Andrea Martin. She is easily Jim's most evil and competent enemy, and, as in the game, attempts to reclaim the suit so she may rule the universe. Unlike many of the villains, who are obsessed with destroying Jim, the Queen sees him more as a pest she has yet to squash, and usually prefers to send less threatening adversaries like Psy-crow. She only deals with Jim herself when she tries to get the suit back. Otherwise, she prefers other schemes, such as turning people into chickens, and hypnotizing Santa Claus. She also loathes anything nice and good, such as chocolate.
In the episode, "Queen What's-Her-Name", the rivalry between the Queen and her sister is expanded on; the Princess, considered "ugly" by the Insectikans, was constantly abused, and ultimately banished by the Queen. What's-Her-Name eventually became the leader of the rebellion against the Insectikan monarchy, and Slug-for-a-Butt seems to hate the Princess much more than she hates Jim. In the episode "Sidekicked", she tells Psy-crow that What's-Her-Name did "something awful" to her.
In another episode, she is exiled from Insektica through a coup staged by Psy-Crow and Professor Monkey-for-a-head, but mangages to live the normal civilian life on Earth and demands that everyone call her Lucy. Ironically, this is the only episode where she actually wears the super suit, given to her by Jim himself in order to help her retake her homeworld, though she reluctantly gives it back at the end of the episode.