The phrase refers to an ensemble designed to replicate the appearance of the character Jeff the Killer for the purpose of celebration on October 31st. The typical assemblage often includes a white hoodie, dark trousers, and makeup or a mask intended to simulate the character’s distinct facial features.
Its prevalence stems from the enduring popularity of the creepypasta character, Jeff the Killer, within online horror communities. Recreating the character’s appearance for celebratory events allows enthusiasts to express their affinity for the genre and engage in a form of performative storytelling. The creation and wearing of such an ensemble provide avenues for creativity, self-expression, and social engagement within specific subcultures.