Jeff the Killer is a fictional character from a type of internet urban legend commonly known as a "creepypasta". The image commonly associated with the creepypasta is commonly used in jump-scares otherwise unrelated to the creepypasta itself.
The creepypasta tells of a teenager called Jeff who had just moved into a new neighbourhood with his family. While waiting for the school bus, he and his brother, Liu, encountered three boys, one of whom carried a knife; just as the three were about to attack Liu, Jeff brutally beat them up, stabbing two of them with a knife. A few days later at a party he really didn't want to go to, Jeff encountered the three boys again; battered and bruised, they attacked Jeff brutally, smashing a vodka bottle on his head. Feeling the same sensation he felt a few days earlier, Jeff's sanity snapped and he retaliated by murdering one of the boys. One of the boys got out a lighter and threw it at Jeff, igniting the vodka and setting him alight. Jeff lay in hospital covered in bandages; when his bandages were removed, his family stared in horror at his pale white face, singed black hair and blood-red lips. The following day, Jeff murdered his family and began his life as a serial killer.
In M.U.G.E.N, Jeff the Killer has been made once by kisaragiryuto.
Jeff the Killer is a paletteswap of Agito of the Dark, though it almost completely ignores the shading of the original sprites. His A.I. is brutal when close, so when fought, characters with projectiles and/or keep-away attacks are best to use. He is difficult to control.
Hovering the mouse cursor over the Command Input icons will display text that refers to the inputs set in M.U.G.E.N's Key Config.
Icons encased in square brackets [ ] require the respective button(s) to be held down. Hovering the mouse cursor over the gap displays the hold duration if applicable.