xiā​shuō

assert groundlessly

瞎说 (瞎說) xiā​shuō
assert groundlessly verb
to assert something without a proper understanding or basis in fact

You shouldn't make unfounded claims without an on-site investigation.

talk drivel verb
to talk nonsense or speak without knowing what one is talking about

He is quite ill and has been talking deliriously, nothing but nonsense.

Frequency

Movie subtitles
6.20 per million appears in 3% of films
Written text
1.06 per million

Sources

Definitions
CC-CEDICT