What does be too into yourself mean?

Be too into yourself is an idiom that means to be excessively self-absorbed or conceited.

When used to describe a person, 'being too into oneself' often means:

- excessively vain

- excessively conceited.

A few synonyms of being too into yourself are conceited, egotistical, full of oneself, arrogant. A few related phrases for you are stuck-up, full of hot air, self-centred, self-important, stuck up, high-and-mighty and pompous.