釋義：

mouth 嘴巴的意思，watering，流口水；字面來看是嘴巴流口水，in English， Having one's appetite enticed. 令人垂涎的

來源：

This expression is simple enough: 這個俚語很簡單The 'water' is not actually water, but saliva that your body will produce when you eat something.這里提到的water實際不是水，而是當我們吃東西時候身體產生的唾液 Sometimes, a person can start this extra saliva production by just thinking about food. 有時候，人們在想到食物的時候就會開始產生唾液Thus, when food is on the mind, a person 'waters' at the mouth.因此，當想到食物時，一個人的嘴巴就會濕；

舉例：

On the way home, I had the imagination of much mouth watering food on the table.

在回家的路上，我幻想著滿桌的可口飯菜。

You can see his mouth watering, let's start to eat right now.

看他那垂涎欲滴的樣子，快開始吃飯吧。