誇こ大だい妄もう想そう

noun, noun which may take the genitive case particle 'no'

megalomania; delusions of grandeur

A four-character compound (yojijukugo) used in both clinical and everyday contexts to describe an exaggerated sense of self-importance or unrealistic grandiosity.

• 彼かれは誇こ大だい妄もう想そうに取とり憑つかれているようだ。

  He seems to be possessed by delusions of grandeur.

• 誇こ大だい妄もう想そう的てきな発はつ言げんが目め立だつ。

  His megalomaniacal remarks stand out.