Bruh became a staple reaction word in Vine and early meme culture before moving to YouTube, TikTok and Discord soundboards. The drawn-out, unimpressed delivery turned the simple slang term into a universal shorthand for disbelief, and editors began dropping it over sports bloopers, gaming fails and cringe compilations. Its popularity survived the platforms that spread it because it needs no context — a single syllable comments on the scene. It remains a go-to sound for creators who want instant, recognizable judgment without adding dialogue.