EGOTIST, n. A person of low taste, more interested in himself than in me.

Ambrose Bierce (1842-1914?) American writer and journalist

“Egotist,” The Cynic’s Word Book (1906)
    (Source)

Included in The Devil's Dictionary (1911). Originally published in the "Devil's Dictionary" column in the San Francisco Wasp (1884-05-17).