From Longman Dictionary of Contemporary Englishfor God’s sakefor God’s sakespoken used to emphasize something you are saying when you are annoyed For God’s sake, shut up! → god
Examples from the Corpus
for God’s sake• For God's sake, shut up!for God’s sakefor God’s sakeinfml used to emphasize what you are saying when you are annoyed Oh, for God’s sake, shut up! → God 