毛骨悚然

Explanation: Erect: frightened. Hairs erect, spine chills. Describe the very fear. 　　Usage: The main predicate; as predicate, attributive, adverbial; describe very scared 　　Source: Ming Luo Guanzhong's "Romance of Three Kingdoms" 22 back: "so this pass into the olive, see the parade, horror, a cold sweat." Thesaurus:  feel nervous about, Mao bone with trepidation, Mao bone looming on the horizon, frightened out of one's wits