What is Holy Wack?
1.
When something exciting happens.
When something disapointing happens.
Alot like holy cow but clearly better.
Holy wack that lamb has a lot of wool!
Holy wack why did you have to go there..
Holy wack why does your grandma have no teath?!
See
2.
=Oh no! (cry of disappointment, disgust or frustration)
Eminem's BUSINESS: "Holy wack, unlyrical lyrics Andre, you're fuckin' right".