家丑不可外扬: domestic shame should not be made public.; don't wash one's dirty linen in public.; don't tell tales out of school.; family troubles are not a thing to be talked about in public
丑事: scandal 短语和例子隐瞒丑事 conceal a scandal; 某人的丑事 a scandal about sb.; 丑事揭发者 muckraker