ELI5: Explain Like I'm 5

Narcissism

Narcissism is when someone has an unhealthy focus on themselves. They think they are more important than they are, and they take credit for things they didn't do. They often think they deserve special treatment, and they can get very angry when they don't get it. They don't usually show concern for other people's feelings, and they may brag and put down other people to make themselves feel better. If they don't get the attention they crave, they can be very unhappy and might even become depressed.
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