The nickname of Airbus A380 is super jumbo. Jumbo jet already used for the nickname of Boeing 747.
Some unofficial nicknames of Airbus A380 are flying forehead, mammoth jet, Whale Jet flying.
Green Giant is also unofficial nickname of Airbus A380. Low fuel consumption of the engines and pollutant levels far below the levels required by the strictest of standards are behind the justifying of this name.