megalomania
n. 妄想自大狂; (对浮夸方案的)狂热
Megalomania is the belief that you are more powerful and important than you really are. Megalomania is sometimes a mental illness.
1. a psychological state characterized by delusions of grandeur
Early success may lead to megalomania.
少年得志可能导致妄自尊大.
If it can cure nothing else, it can cure man of megalomania.
它如果不能治愈别的疾病, 至少能够治愈人类的狂妄自大的病.