1 to feel sad

1 surname Niu

1 cow's milk

2 classifier: 瓶 píng

3 classifier: 杯 bēi

1 beef

1 sour

2 tart

3 sick at heart

4 grieved

5 sore

6 aching

7 pedantic

8 impractical

9 to make sarcastic remarks about sb

10 an acid

1 lit. one hair from nine oxen (idiom)

2 fig. a drop in the ocean

1 tremendous strength (idiom)

1 lit. newborn calves do not fear tigers (idiom)

2 fig. the young are fearless

1 lit. why use a pole-ax to slaughter a chicken? (idiom)

2 fig. to waste effort on a trifling matter

3 also written 殺雞焉用牛刀|杀鸡焉用牛刀[shā jī yān yòng niú dāo]

1 to call sth a cow or a horse (idiom); it doesn't matter what you call it

2 Insult me if you want, I don't care what you call me.