bù​zhī​suǒ​yún

unintelligible

不知所云 bù​zhī​suǒ​yún
unintelligible idiom
to be incoherent or nonsensical, such that the listener or reader cannot understand the intended point

His speech was so illogical that nobody could make sense of what he was saying.

Frequency

Movie subtitles
1.22 per million appears in 0% of films
Written text
0.718 per million

Sources

Definitions
CC-CEDICT