zì​qī​qī​rén

to deceive oneself and others

自欺欺人 zì​qī​qī​rén
to deceive oneself and others verb
To deceive both oneself and other people; to believe one's own lies in an attempt to fool others.

Frequency

Movie subtitles
3.55 per million appears in 2% of films
Written text
2.33 per million

Sources