America's airmen have long held unofficial nicknames for the aircraft they love — and for the aircraft they hate. Some are more well-known than others. For example, everyone knows the A-10 Thunderbolt II as the "Warthog" because when it first entered service, it wasn't considered a very attractive airframe. Then there's "BUFF" (Big, Ugly, Fat F---er), the name somewhat-lovingly given to the B-52 Stratofortress.