have a caustic and flippant tongue
Sharp tongue, a Chinese idiom, Pinyin is Ji ā nzu ǐ B ó sh é, which means to describe sharp and mean. It comes from the marriage story of awakening the world.
The origin of Idioms
The 51st chapter of the romance of awakening the world written by Xi Zhou Sheng in Qing Dynasty: "this Liu Gongsu was originally a crooked man, but also relied on three evil sons: hard jealousy, soft bullying, rich jealousy, poor jokes, sharp tongue, talking about people's right and wrong, and counting people's housework."
Idiom usage
It is used as an attribute or an object. You want to cheat me to eat wine and fight me to go. You have these words. (the third chapter of Jing Hua Yuan by Li Ruzhen in Qing Dynasty)
Analysis of Idioms
Xiehouyu woodpecker's speech synonym acrimony antonym spring breeze discrimination ~ compared with "acrimony": ~ focuses on being harsh; while "acrimony" focuses on language acrimony
have a caustic and flippant tongue
be in harmony in appearanc but at variance in heart - mào hé qíng lí
demolish with penetrating criticism - biān pì jìn lǐ