So go to hell and build a snowman, girl

from Eminem – Almost Famous Lyrics on Rap Genius

Meaning

The phrase “when hell freezes over” is used usually in reference to something that is not very likely to happen.

He could also just be telling the girl to fuck off, by telling her to go do some impossible task

To help improve the meaning of these lyrics, visit “Almost Famous” by Eminem Lyrics and leave a comment on the lyrics box