From Longman Dictionary of Contemporary Englishfor heaven’s sakefor heaven’s sakea) ANNOYused to show that you are annoyed or angry Oh, for heaven’s sake, Mark, do you have to make everything into a joke? b) EMPHASIZEused to emphasize a question, request, order, or opinion For heaven’s sake, let’s all get to sleep. → heaven
Examples from the Corpus
for heaven’s sake• For heaven's sake, don't tell him my age!• Where was the kid's mother, for heaven's sake? 