The name combination of Zuko and Aang, characters from the cartoon Avatar: The Last Airbender.
Not necessarily used romantically.
Avatard 1: OMG did you see the latest Avatar ep.? Zuko and Aang are bff now.
Avatard 2: Zukaang FTW!!
Avatard 2: I was reading an Avatar fan-fic the other day and Zuko and Aang hooked up. ><
Avatard 1: Zukaang FTW!!