一个非常有用且地道的表达——漱口， 这个短语的含义不是指“wash one's mouth”，其正确的含义是：

rinse out one's mouth漱口

rinse out 的中文含义为： 冲洗，涮洗（…的内部）

She rinses out her mouth every morning to prevent bad breath.

她为除口臭每天早上都漱口。

I wanted to rinse the taste out of my mouth. It is important to leave a good impression to others.

我想漱漱口，去掉嘴里的味道。给别人留个好印象真的很重要。

If you feel the need to rinse out your mouth after brushing, use a (non alcohol-based) mouthwash.

如果你刷牙之后需要漱口，就用(不含酒精的)漱口水吧。

After having a meal, be sure to rinse out your mouth.

吃完一顿饭之后，确保要漱口一下。

I really have to rinse out my mouth after eating some garlic bread.

在吃完香蒜面包时，我真的必须要漱口。

出处：头条号 @饼哥英语口语