meant to be said in a korean accent which makes it sound sarcastic but really isn't. used when something amazes you or is unexpected. this phrase was first used as a catchphrase by kim yugyeom, the cute maknae of GOT7.
tip: watch compilation videos of yugyeom saying 'wow so amazing' to know how to imitate him😉
person: did you know pigs can actually fly?
you: really? WOW SO AMAZINGGG!