Peikeuda comes from Korean online slang, combining the loanword for fake with a blunt declarative ending that turns it into a flat statement. The phrase circulates in gaming chats, livestreams and short-form video, where viewers use it to challenge a suspicious play, an edited clip or a claim that sounds too good to be true. Its appeal is its brevity and certainty, so creators reuse it as a quick verdict rather than a long explanation. As Korean meme phrases travel through reaction videos and social feeds, the clip has found a wider audience that recognises its tone.