1. The mixing of Sprite (or other lemon-lime soda) with orange soda, most commonly at fast food restaurants that allow customers to fill their own sodas. By doing a 50/50 mix of Sprite and orange, the citrusy beverage Sprorange is the result. Sierra Mist and 7 Up are also suitable alternatives, though Sunkist is preferable to Fanta for the orange flavor.
2. One of the only known words to rhyme with "orange".
Last night at Burger King we made Sprorange over at the self-serve soda station, and it washed down those dry french fries quite nicely.