Bruh built up as everyday slang for disbelief before becoming a staple reaction sound on Vine, YouTube and TikTok, where a single flat word could replace a whole response. The slowed edit follows the wider trend of pitching down familiar meme clips to make them sound heavier and more exhausted. That stretched delivery helped it survive beyond the original clip, because it fits gaming fails, sports bloopers and awkward text screenshots equally well, and viewers recognise the meaning instantly even without any context or explanation provided.