good grief!
used when you are slightly surprised or annoyed

[TahlilGaran] Dictionary of Contemporary English ▲

good grief
I am very surprised.
"I have four computers at home" "Good grief. What do you do with them all?"

Usage notes: often used humorously, when someone pretends that a situation is more serious than it really is:
Good grief, look at all this food! Are you feeding an army?

[TahlilGaran] English Idioms Dictionary ▲

Good grief!
used to show surprise (good or bad)
"Good grief! It's 6:00 and I still have not finished this job."

[TahlilGaran] English Idioms Dictionary ▲

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: GOODNESS GRACIOUS!, HEAVENLY DAYS!, HOLY CATS or HOLY COW or HOLY MACKEREL or HOLY MOSES. See: GOODNIGHT².

[TahlilGaran] English Idioms Dictionary ▲