half-pounder Share definition Flag The McDonald's secret menu item consisting of a plastic bag filled with all of the employee's spit and urine. Man I sure could use a McDonald's half-pounder sliding down the gullet right now! half-pounder by DEEPFRIEDDADDY June 8, 2019 0 0 Get merch Get the half-pounder mug. Buy Now — $32.95 See more merch