自じ信しん過か剰じょう

noun, na-adjective, noun which may take the genitive case particle 'no'

overconfident; presumptuous

Describes a person or attitude that is excessively self-assured, often crossing into arrogance or taking liberties.

• 彼かれは自じ信しん過か剰じょうで、人ひとの意い見けんを聞きかない。

  He is overconfident and doesn't listen to others' opinions.

• 自じ信しん過か剰じょうな態たい度どが失しっ敗ぱいを招まねいた。

  His overconfident attitude led to failure.