须发皆张
须 - Beard
发 - Hair
皆 - All
张 - Spread/Open up
If it was directly translated, it would be something like "[someone's] beard and hair all spread open", but what does that even mean?
I can't really imagine how the person would look, so would the person have hair and a beard that stood up, like how someone would after their hair was affected by static electricity?
言未訖，只見關公口開目動，鬚髮皆張，操驚倒
Before he had finished speaking, he looked at Lord Guan and saw: His mouth was open, his eyes were starting, His beard and hair were all bristling and crackling!
Cao Cao was petrified with fear.
Imagine a furious cat ready for fighting, what will it do? It will "须发皆张".
A literal translation: beard and hair both stand on the ends.
Metaphorical meaning: to describe someone is displaying extreme anger.
