What does bullwhip mean?

1, Niu Er is a character in the Water Margin, whose real name is Niu Er. He fanned the flames in the east corner of Kaifeng Prefecture in Tokyo, fawned on powerful people and helped Cai Jing and Liang Zhongshu oppress the people.

2. Niu Raul is also an online buzzword, meaning that this talent is the boss.