自大狂

zìdàkuáng
  1. megalomania
  2. egomania
  3. delusions of grandeur

CEDICT

megalomania; egomania; delusion of grandeur

Wiktionary

Entry Composition

1 自大 zìdà arrogant
2 狂 kuáng
  1. mad
  2. wild
  3. violent