The line comes from Pixar's WALL-E, released in 2008, in which a lone robot discovers a small green plant growing in the rubbish of an abandoned Earth. The plant becomes the film's most important object, proof that life can return, so every character who wants it treats it as something worth fighting over. Clipped from that moment of urgency, the short demand has travelled beyond the film into meme edits and reaction videos, where it now stands in for any moment when someone wants an object badly enough to insist on having it immediately.