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 lip

2 classifier: 片 piàn

1 mouth

2 classifier: 张 zhāng

3 slap in the face

4 classifier: 个 gè

1 variant: 胸 xiōng

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 outspoken and frank (idiom)

1 sweet mouth, bitter heart (idiom); insincere flattery

1 to cause a dispute through boastful gossip (idiom)