The facepalm gesture has been a universal shorthand for frustration long before memes, but online it became a staple reaction image and sound during the rise of reaction culture in the 2000s and 2010s. Short clips built around the moment spread through forums, Vine, YouTube edits, and later TikTok, where creators needed an instant way to signal disbelief without explaining the joke. It has stayed popular because the meaning is understood in every language, needs no setup, and fits almost any embarrassing fail, bad take, or obvious mistake caught on camera.