Nope.avi is a legendary internet reaction originating from a short YouTube video uploaded by user Jimbomcb in January 2011. The video features the Engineer character from Team Fortress 2 wearing his signature hard hat, whose neck unnaturally extends as he utters a blunt, monosyllabic 'Nope.' Developed using Source Filmmaker and Garry's Mod, the clip quickly transcended its gaming roots to become a universal shorthand for a hard refusal or an immediate exit from an uncomfortable or undesirable situation. Its surreal animation and the Engineer's deadpan delivery have cemented it as one of the most enduring reaction memes in digital culture, frequently used in forums and social media to shut down arguments or express disbelief.