The line comes from Team Fortress 2, Valve's multiplayer shooter, where the Heavy class can call for a dispenser, a device that restores health and ammunition for teammates. Players heard his accented delivery as 'Pootis Spencer here', and the mishearing took off in YouTube videos, edits and soundboards, where it was repeated as a running joke and a fake name for Heavy himself. Its brevity, clear delivery and long life in TF2 meme culture keep it useful for introductions, parodies and gaming clips today.