Formal terms:
* Narcissistic: This term describes someone with a personality disorder characterized by an inflated sense of self-importance, a need for excessive admiration, and a lack of empathy.
* Egocentric: This describes someone who is excessively self-centered and preoccupied with their own needs and interests.
* Self-absorbed: This term implies that someone is so focused on themselves that they are oblivious to the needs and feelings of others.
Informal terms:
* Self-obsessed: This is a more informal way of saying someone is obsessed with themselves.
* Vain: This describes someone who is excessively concerned with their own appearance and attractiveness.
* Conceited: This refers to someone who has an exaggerated sense of their own importance.
* Egotistical: This implies someone is boastful and self-important.
Other options:
* Self-love: This term can be used positively to describe a healthy level of self-esteem, but it can also be used negatively to describe someone who loves themselves too much.
* Arrogant: This describes someone who has an exaggerated sense of their own importance and superiority.
Ultimately, the best term to use will depend on the specific situation and the level of formality required.
It's important to remember that these terms can be offensive and should be used with caution.