The 'For Frodo' meme originates from the climactic battle scene in the 2003 film 'The Lord of the Rings: The Return of the King.' Just before charging into a seemingly hopeless battle against the armies of Sauron at the Black Gate, Aragorn (played by Viggo Mortensen) turns to his friends, whispers 'For Frodo,' and leads the charge to buy the hobbits time. The meme is used to signify a selfless act of bravery, a desperate sacrifice, or ironically to justify doing something unnecessary for the sake of a friend or a niche interest. It captures the essence of loyalty and the 'last stand' trope that resonates across internet culture.