"The Grim Adventures of Billy & Mandy" is an animated television series that aired on Cartoon Network. The show follows the misadventures of two children, Billy and Mandy, who win a game of limbo against Grim, the Grim Reaper. As a result, Grim is forced to be their best friend and servant, leading to various comedic and darkly humorous situations. The series features a unique blend of horror and comedy, showcasing the trio's interactions with other characters, including Irwin, a classmate with a crush on Mandy, and various supernatural beings. The show is known for its distinctive animation style and offbeat humor, appealing to both children and adults.