中文翻译与英英解释

n.
自负[大]狂，自我中心狂。
adj.
-niac

an intense and irresistible love for yourself and concern for your own needs

Egomania is an obsessive preoccupation with one's selfdictionary.com and applies to someone who follows their own ungoverned impulses and is possessed by delusions of personal greatness and feels a lack of appreciation.