I've written before about my high school orchestra director's habit of repeating statements for emphasis. This also applied to his equivalent of swearing. He never cursed in front of his students. You could tell he was upset or disappointed, however, when he said, "Sugar. Sugar," or "Son of a biscuit. Son of a biscuit..."
I've never heard anyone else use those words as substitutes for profanity, but they work. Mr. D.'s gravely serious repetition of them made them stand out even more.
