自大狂

megalomania / egomania / delusions of grandeur

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

self / oneself / from / since / naturally / surely

mad / wild / violent

arrogant