Plants vs Zombies is the long running tower defense game series where plants defend a house from waves of zombies, and its exaggerated sounds have become familiar far beyond the games themselves. Short reaction clips from games are widely slowed down online to make them funnier and more dramatic, and this Nooo follows that pattern. The slowed edit spread as a reusable meme sound on short videos and soundboards, where the connection to a lost game makes it a clear shorthand for defeat.