My three year old asked me this today, out of the blue .. as they do.
I expect he overheard me saying 'Oh, for heaven's sake' or something equally Joyce Grenfellesque when I placed my naked foot squarely on a small, green building block this afternoon. I mean, he didn't ask me what FUCK meant, so I must have alluded to the heavens, right?
Any hooo, without resorting to the dictionary or to Google, can anyone explain to me what 'sake' means ... as in, 'for heaven's sake', or 'we should go to the party for Mary's sake.'