NAFA stands for National Association of Fat Asses. This is a group of lard buckets who advocate the changing of conditions to accommodate extreme fatness such as forcing a struggling airline company to allow lardos to occuppy 3 seats for the price of one and giving more access to fatmobiles at stores.
Bob: NAFA is campaigning to force airlines to allow Jumbo Jimbo over there to only have to pay for one seat although he takes up three. They say it's unfair.
Brian: Maybe the airline should refer to their current policy as a fat tax.