Sans is a skeleton character from Undertale, the indie role-playing game released in 2015, and like other characters in the game he speaks through short synthesized voice blips rather than recorded dialogue. His low, deadpan blip became closely linked to his humour and laid-back personality, and fans began lifting it for edits, animations and jokes long after the game first appeared. It spread through YouTube and TikTok Undertale content and general meme soundboards, where a single blip is enough for viewers to recognise him instantly.