to air your dirty laundry in public<美>使家丑外扬；把丑事公开
The spectacle of the former naval officers washing their dirty linen in public was distinctly embarrassing.前海军官员们自曝家丑的做法显然非常令人尴尬。
We shouldn't wash our dirty laundry in public and if I was in his position, I'd say nothing at all.家丑不可外扬, 我要是他, 就什么也不说。