ドあほうじゃありませんでした
ド阿呆じゃありませんでした
doahōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of ドあほ

1. Was not an idiot.; Was not foolish.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana