Penny it Forward Share definition Flag The act of leaving your left over penny or pennies from unwanted change at the counter of a convenient store. "Mister, don't you want the rest of your change?""Nah, just Penny it Forward'" Penny it Forward by relaxfrancis October 13, 2009 0 0 Get merch Get the Penny it Forward mug. Buy Now — $32.95 See more merch