一本正经

She always give clients an impression of humourless prude.

(不苟言笑，本正经印象)。

Lawyer Utterson is a non-talky and nannyish people.

律师厄特森先生是个不爱说话、本正经人。

Don't you be so fucking formal with me.

别你他本正经了。

I don't like proper children.

不喜欢本正经孩子。