Hi^^ nice to meet you!
Basically, 였음 is a kind of slang(I think^^;;It is incorrect grammatically) and abbreviation of 였다.
였다 means "was", 진짜 means "really", 허우 means expression of sigh
so, that sentence has no meaning^^
I guess it's saying "It was blah blah really!! (sigh)~"
did my explain help you understand..?? I hope you do ^^;;