
Egomaniac
Negative Connotation
The term 'egomaniac' implies strong negativity and is used to criticize or disapprove someone's behavior.

Don't be such an egomaniac; the world doesn't revolve around you!
Informal Usage
'Egomaniac' is informal and might be seen as rude or insensitive if used in professional or polite conversations.

I would never call my boss an egomaniac, even if it's true.
Humor or Sarcasm
Sometimes 'egomaniac' is used humorously or sarcastically among friends or in casual settings.

Here comes the egomaniac - ready to talk about himself again!
Compare with
ArrogantBoastfulConceitEgotisticallyHaughtyNarcissistSelf-importantVain
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