家醜不可外傳 [ㄐㄧㄚ ㄔㄡˇ ㄅㄨˋ ㄎㄜˇ ㄨㄞˋ ㄔㄨㄢˊ; jia1 chou3 bu4 ke3 wai4 chuan2] lit. family shames must not be spread abroad (idiom); fig. don't wash your dirty linen in public ◄ ►