What is Guan Yu's nickname in Romance of the Three Kingdoms?

Guan Yu has two nicknames recorded in historical records. One is called Beard, which was given to Guan Yu by Zhuge Liang because Guan Yu's beard is beautiful. Another nickname is "ten thousand enemies", which was given to Guan Yu by Cheng Yu, a counselor of Wei State. He said that Guan Yu had the courage to do something wrong and described it very well.