egomaniac
/ˌiːɡoʊˈmeɪniæk/
noun
- 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.
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