Kifflom comes from Grand Theft Auto V (GTA V), released in 2013, where the Epsilon Program is a fictional cult satirising celebrity religions and self-help movements. Its followers greet each other with the word Kifflom, and players hear it from non-player characters around Los Santos and during Epsilon-related missions. The greeting spread through gameplay clips, GTA edits and soundboards because it is short, instantly recognisable to fans and funny out of context. It remains popular as a quick shorthand for mock cult devotion, absurd politeness and insider GTA humour.