dirty linen

US /ˈdɜːr.t̬i ˈlɪn.ɪn/
UK /ˈdɜːr.t̬i ˈlɪn.ɪn/
"dirty linen" picture
1.

内輪の恥, 隠しておきたい個人的な事柄

private and embarrassing matters that one would prefer to keep secret

:
They aired their dirty linen in public during the divorce proceedings.
彼らは離婚訴訟中に内輪の恥を公衆の面前でさらした。
It's best not to discuss your family's dirty linen with strangers.
家族の内輪の恥を他人に話さない方が良い。