The straight face emoji, often called the expressionless face, has long been used online to show boredom, annoyance or a complete lack of reaction. As meme editing moved to short video, creators turned that same blank expression into a sound cue, pairing the emoji with a flat, deadpan clip. It spread through reaction videos, comment edits and chat soundboards because it needs no explanation and works in almost any language. It remains popular for the straight meme face moment, where the joke is that there is no reaction at all.