An extreme form of self-centeredness where someone is obsessed with themselves and believes they are superior to everyone else.
From ego (Latin 'I') plus -mania (Greek for 'madness' or 'excessive desire'). The term was popularized in the 19th century to describe what was seen as a psychological disorder of excessive self-love and self-importance.
Egomania gets its scary '-mania' suffix from the same root as 'kleptomania' (stealing obsession) and 'pyromania' (fire obsession)—it frames self-obsession as literally a form of madness, which is wild.
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