zì​zuò​cōng​míng

to think oneself clever

自作聪明 自作聰明 zì​zuò​cōng​míng
to think oneself clever
(idiom) to think oneself clever; to outsmart oneself by being too clever; to act presumptuously based on a mistaken belief in one's own intelligence

Frequency

Movie subtitles
2.30 per million appears in 1% of films
Written text
0.807 per million

Sources