Major Mucus is one of the main villains from the Earthworm Jim series.
Major Mucus is the evil ruler of Planet Mucus, a planet completely made of slippery green slime. He keeps a strict military dictatorship over his subjects, severely punishing anyone who disobeys his orders. He also captures any living being that gets near his planet, and just for fun hangs them over huge slippery pits just to watch them fall in and be devoured by his pet, the Mucus Phlegm Brain, which is a monster that dwells in the bottom of the pits, with a huge mouth and a big eye that it uses to peek over the slime. Being a power-hungry dictator, he wishes to conquer all the galaxy, but is unable to do so because of the Queen Pulsating, Bloated, Festering, Sweaty, Pus-filled, Malformed, Slug-For-A-Butt, who have a much more powerful empire that is also bent on conquering the universe. Angry by the mere thought of existing something more powerful than him, he sent a spy to steal information from the Queen's subjects, and discovered about a special equipment being delivered to the Queen. Deducing it should be a very powerful weapon, he decided to steal it. Luckily, he didn't had to move a inch, because this special weapon just happened to go straight to him. Earthworm Jim, the owner of the space suit, got into Planet Mucus while following Psy-Crow, so Major Mucus captured him and hanged him over a pit, but Jim fought back and the two entered a bungee-jump battle, which ended with Jim victorious and Mucus humiliated in front of his servants, who laughed for the first time in their lives. Jim came to his planet a second time, but decided to avoid confrontation. Mucus, however, wouldn't let Jim get out of his planet so easily, as he was more than eager to get his revenge. Jim simply let loose a huge bomb over Mucus, making him fall over his pit once again, making him get even more angry.