The line comes from Call of Duty 4 Modern Warfare, released in 2007, during the opening training sequence where Captain Price meets Sergeant John MacTavish for the first time. Price reads the callsign Soap and questions it on the spot, setting up the pair who became central to the Modern Warfare story. As clips from the campaign circulated in gaming edits and soundboards, that single exchange became shorthand among players for mocking any unusual name, keeping it in use long after the original mission.