Bruh has long been used online as a short, deadpan response to something stupid, shocking or disappointing, and stretching the word out turned that quick reaction into a longer moment of disbelief. The elongated version spread through short-form video and meme edits, where creators place it over fails, awkward pauses and unbelievable statements instead of adding commentary. Its staying power comes from how instantly recognisable it is, even without context, and how easily it fits almost any disappointing or confusing moment in a clip.