发神经 fāshénjīng to go crazy Origin Definitions Defs Strokes Stroke Words Sentences Sents 发 發 fā verb to happen To occur; to take place; to come into existence神经 神經 shénjīng crazy (colloquial) insane; unhinged; acting in an abnormal or irrational way, often used as an insult or to describe mental instability