narcissism
n. uncountablen. too much love for yourself and your own appearance. It often means someone thinks they are much more important than other people.
n. excessive interest in or admiration of oneself and one's physical appearance. In a psychological context, it refers to a personality trait characterized by a sense of entitlement and a lack of empathy.
His constant mirror-checking was a sign of his narcissism.
Social media platforms are often criticized for encouraging narcissism by rewarding users for constant self-promotion.
While a healthy level of self-regard is necessary for confidence, pathological narcissism involves a fragile ego that requires constant external validation to maintain its sense of superiority.
From obsolete German Narzissismus (now Narzissmus by haplology), from Narziss (“Narcissus”) + -ism. By surface analysis, Narciss(us) (“character in Greek mythology who became obsessed with his own reflection”) + -ism.
Uncountable in its general and psychological sense; often paired with 'extreme' or 'pathological'.