too embarrassing, offensive, or shocking to be spoken about 不宜说的;说不出口的 the unmentionable subject of incontinence. 说不出口的尿床事。
noun
(usu. unmentionables)(chiefly humorous)a person or thing that is too shocking or embarrassing to be mentioned by name (主幽默)不宜说出的事(或人) wearing nothing but fig leaves over their unmentionables. 他们的隐私处除了几片无花果叶什么也没有。