1 to brush one's teeth

1 unable to conceal one's happiness, amazement, shock etc

2 grinning from ear to ear

3 mouth agape

4 gobsmacked

1 mouth

2 beak

3 nozzle

4 spout (of teapot etc)

5 classifier: 张 zhāng

6 classifier: 个 gè

1 mouth

2 classifier: 张 zhāng

3 slap in the face

4 classifier: 个 gè

1 tooth

2 ivory

3 classifier: 颗 kē

1 an eye for an eye, a tooth for a tooth (idiom)

2 fig. to use the enemy's methods against him

3 to give sb a taste of his own medicine

1 clever and eloquent (idiom); fluent

2 having the gift of the gab

1 to have a sharp tongue but a soft heart (idiom)

1 lit. the mouth that has been fed by others is soft, the hand that has received doesn't reach (idiom)

2 fig. one is partial to those from whom presents have been accepted

1 gnashing one's teeth (idiom); displaying extreme anger

2 fuming with rage between gritted teeth