Bruh began as casual slang for brother before becoming a staple reaction word in online videos, where a single flat utterance could sum up disbelief without any explanation. Creators soon stretched that reaction into longer versions for meme edits, reaction videos, and short-form clips, using the extra length to emphasise how unimpressed or defeated a moment felt. Shared widely on TikTok, YouTube, and soundboards, the long bruh has stayed popular because it works in almost any fail or awkward context and needs no setup to be understood.