This is the 3895th most frequent Chinese word.
下口
"下口" means "take a bite" or "begin to eat."
In this sentence, 下口 means 'to start eating'. It describes the action of tasting or starting to eat food.
这个菜太烫了,我暂时没法下口。
This dish is too hot, I cannot eat it for now.
Here, 下口 again means 'to start eating', emphasizing eagerness due to deliciousness.
食物太美味了,我迫不及待地下口。
The food is so delicious that I can't wait to dig in.
In this case, 下口 metaphorically applies to speaking, referring to the act of starting to express oneself verbally.