NFL gum Share definition Flag NFL = No Flavor Left. ABC gum, especially pink bubble gum, exhausted of its flavor, to be thrown out or left stuck under tables or desks. I'm spitting out this NFL gum. There's no flavor left. NFL gum by meow2u3 December 18, 2010 0 0 Get merch Get the NFL gum mug. Buy Now — $32.95 See more merch