shén​jīng​bìng

lunatic

神经病 (神經病) shén​jīng​bìng
lunatic noun
A derogatory slang term for someone acting irrationally, stupidly, or annoyingly.

这个神经病说话

zhè​ge shén​jīng​bìng, kuài bié luàn shuō​huà le!

You lunatic, stop talking nonsense!

neuropathy noun
A medical condition affecting the nervous system or a psychiatric disorder.

The doctor believes his strange behavior is caused by a mental illness.

Frequency

Movie subtitles
12.9 per million appears in 5% of films
Written text
6.91 per million

Sources

Definitions
CC-CEDICT