full of oneself

• full of one's self

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full of oneself (comparative more full of oneself, superlative most full of oneself)

1. (idiomatic) Egotistical, believing oneself to be superior to others; preoccupied with one's own work, interests, point of view, etc.
   • 1897, Andrew Lang, chapter 8, in Pickle the Spy:

     I thought it not amiss to write him a line to let him know the regard you had for him, for as I know him to be vastly vain and full of himself I thought this might be a spur to his zeale.

• cocky
• self-centered
• snooty