The Brain-Eating Meteor is the main antagonist of the episode "Little Rock of Horrors" of Grim & Evil and the The Grim Adventures of Billy & Mandy Video Game.

The meteor appeared before a lonely Billy and convinced the idiotic boy through song into bringing everyone in Endsville to him for their brains to be eaten in exchange for his "friendship". Billy fed every human being in town to the meteor without second thoughts except for Mandy, since he considers her his best friend.