Booing has long been the crowd's way of showing disapproval at sports games, talent shows and public performances, and that familiar jeer transferred easily to short online video. Creators began using a stretched, sarcastic boo as a quick shorthand for failure, embarrassment or a bad opinion, because listeners recognise the meaning instantly without any explanation. It now appears in reaction clips, gaming fails, sports edits and comedy sketches whenever someone needs an instant judgement, and its simple, human sound keeps it useful long after more complex memes fade.