Why do you always talk nonsense?

Why do you say that Zeng Lao's nonsense is a common idiom in spoken English? Originally, it was used as "nonsense opening and closing" and "letter" which meant letting go. "Opening and closing" means opening and closing. "Opening and closing your mouth" means opening and closing your mouth at will and making up many unreliable words. Opening and closing is also written as "river", because "river" and "combination" are homophonic, and there is an idiom to describe the eloquence of words.