The line comes from Paul Thomas Anderson's 2007 film There Will Be Blood, where oilman Daniel Plainview, played by Daniel Day-Lewis, uses a milkshake and straws to explain how drainage lets one driller take oil from a neighbour's land. The scene builds slowly before Plainview snaps, and that sudden shift made the quote easy to lift out of context. It spread through reaction videos, gaming clips, and sports edits, where the milkshake became shorthand for stealing an advantage in plain sight. Its staying power comes from that clear, visual metaphor and Day-Lewis's intense delivery.