Daily Chinese Idiom Guessing Game
To make one's hair stand on end; extremely shocking or outrageous.
发指头发竖起来，形容极为愤怒。使人头发都竖起来了。形容使人极度愤怒。
《庄子·盗跖》谒者入通，盗跖闻之大怒，目如明星，发上指冠。”
The corruption in the government was so rampant that it was truly hair-raising.