good grief/God/Lord/heavens/gracious!
From Longman Dictionary of Contemporary Englishgood grief/God/Lord/heavens/gracious!good grief/God/Lord/heavens/gracious!used to express surprise or anger ‘It’s going to cost us £500.’ ‘Good grief!’ → goodExamples from the Corpusgood grief/God/Lord/heavens/gracious!• Good grief! I forgot my keys again.