牛溲马勃 (牛溲馬勃) niú sōu mǎ bó

niú sōu mǎ bó set phrase cow's piss, horse's ulcer; worthless nonsense; insignificant
Domain: Idiom 成语 , Subdomain: , Concept:
Notes: (CC-CEDICT '牛溲馬勃')