do not know what oneself or others are talking about
The Chinese idiom, pronounced B ù zh ī Su ǒ y ú n, means that you don't know what you're talking about. It describes people's confused logic, unclear expression and incoherence.
Analysis of Idioms
[synonym] is not to the point, incoherent, hesitant, and [antonym] is concise, easy to understand, and to the point
Idiom usage
It has a derogatory meaning, which means I don't know what to say. The article is too illogical to be read.
do not know what oneself or others are talking about
take mean advantage of someone when he is down - xià jǐng tóu shí
severity in speech and fairness in principle -- as the utterance of an upright person - cí yán yì zhèng
a good essay which has solid substance and beautiful sentences - xián huá pèi shí
look after the suffering of the people - guān xīn mín mò