Slasher McGee is a character who only appears in the episode "Don't Look Now."
Slasher McGee appears just after midnight riding down conch street on his tricycle wearing a Jason style hockey mask.
Slasher McGee appears in "Don't Look Now" after a foghorn sounds. At first, SpongeBob and Patrick mistake him for The Fisherman, but then as Slasher McGee rides past Patrick's rock, SpongeBob says, "Oh, it's just Slasher McGee."
Slasher McGee was on the title/loading screen in the SpongeBob Moves In! during the Halloween event.