full of (oneself)
Having an inflated view of one's importance, to the annoyance of others. Oh, he is so full of himself! Despite what he's told you, he is not the most valuable member of our team, believe me.
*full of oneself
Fig. conceited; self-important. (*Typically: act ~; be ~.) Mary is very unpopular because she's so full of herself. She doesn't care about other people's feelings. She's too full of herself.
full of oneself
Conceited, self-centered, as in Ever since she won the prize Mary's been so full of herself that no one wants to talk to her . This expression uses full of in the sense of "engrossed with" or "absorbed with," a usage dating from about 1600.