show one 's horns
Chinese idiom, Pinyin is Z é it ó ugu ǐ n ǎ o, which means furtive and furtive. It's the same as "a thief's head and a rat's brain". It comes from the flower of the evil sea written by Zeng Pu in Qing Dynasty.
The origin of Idioms
The 24th chapter of Zeng Pu's Nie Hai Hua in Qing Dynasty: "madam, this foreigner is a thief. I always doubt him."
Idiom usage
Used as a predicate, attributive, or adverbial; used in figurative sentences
Examples
Jing fan frowned and said, "what are you doing there? Get out of here! " Eileen Chang's Xiao AI
show one 's horns
Abandon books and donate Swords - qì shū juān jiàn