Kiryu Coco was a Hololive virtual YouTuber known for loud, comedic streams and a large English-speaking audience, and short reaction clips from her broadcasts circulated widely among fans and meme editors. This brief bruh became a handy shorthand for disappointment, disbelief and mild contempt, especially in anime and gaming edits where a single word says more than a long rant. Its brevity makes it easy to reuse, and it still appears as an awkward moment punchline because the delivery feels instantly familiar to viewers who followed VTuber culture.