think one is it

English

Verb

think one is it (third-person singular simple present thinks one is it, present participle thinking one is it, simple past and past participle thought one was it)

1. (informal) To have an unrealistically high opinion of oneself.

   Synonyms: (vulgar) think one is the shit, (vulgar) think one is hot shit, (vulgar) think one's shit doesn't stink, (vulgar) think the sun shines out of one's arse

Further reading

• “think you re it” in Longman Dictionary of Contemporary English, Longman.
• “think you re it”, in Collins English Dictionary.