unfounded hearsay
Tongniujiaoma, a Chinese idiom, Pinyin is t ó ngni ú Ji ǎ om ǎ, which means to refer to things of different kinds; it also refers to things that are against common sense and impossible to exist. It's from Geng, taixuanjing.
Idiom explanation
Bull: cattle without horns; wildebeest: horse with horns.
The origin of Idioms
Yangxiong's taixuanjing Geng of the Han Dynasty said: "tongniujiaoma is immortal."
Idiom usage
Combined; as object and attribute; with derogatory meaning.
unfounded hearsay
a family of scholars for generations - shì dài shū xiāng
The top down and the bottom down - dǎo guàn luò pèi
congratulate each other by raising the hand to the brow - é shǒu chēng sòng