egomaniac

/ˌiːɡoʊˈmeɪniæk/
noun
  1. A person who is extremely self-centered and thinks they are more important than everyone else.
    • She became an egomaniac after her first book became a bestseller.
    • The boss is such an egomaniac that he only talks about his own achievements.
    • Living with an egomaniac is exhausting because they never consider anyone else's needs.
Antonyms
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