good grief!
good grief! {interj.}, {informal}
Wow! Indication of surprise, good or bad.
"Good grief," Joe cried out loud. "Is this all you will pay me for my hard work?"
What a figure Melanie has, good grief! I wonder if she would be willing to go out with me.
Compare:
HOLY CATS or
HOLY COW or
See: GOOD NIGHT (2).
Categories:
Source: A Dictionary of American Idioms