The Earworm

The Earworm is a mysterious species of ear-dwelling creatures used by McDonald's to control their victims.

Biology
The Earworm aren't physical creatures - instead they are composed of music (see what I did there?). This unique composition gives them ability to spread themselves through victim's ears. After the creature gets inside its hosts brain it embeds itself into the victim's memories and takes control of them. In memories the Earworm appears as a psychedelic worm.

History
It is not known when McDonald's began to use the Earworms.

Numerous earworms struck the population of New Chicago during the Battle of New Chicago, apparently from a tune caused by Double-Cheese. Pasi Palpatine and Adolphus Kaskelotti were among infected. The heroes found out that Loirite protects also from the Earworms. The one of the most efficient ways to remove the Earworm is the middle finger of an Apsi Apes.

Appearances

 * Episode V: McDonalds Strikes Back (first appearance)
 * Macdonaldnomicon