good; be arrogant
"(niú)" originally means "cow". Metaphorically it refers to someone who is very capable or has a strong ability. It can also be used to describe someone who is conceited or self-important
Xiǎolín, nǐ zhēn niú, yòu dé le dìyī.
Xiaolin, you have done so well in the exam. You are the number one again.
Tā bú jiùshì pāi le yí bù diànyǐng ma, yǒu shénme kě niú de?
He has just directed one movie. How can he behave so arrogantly?