馬鹿 ばか野郎 やろうではありませんでした
bakayarōdewārimasendeshita

Noun
Desu Copula
Interjection

The polite, past negative form of 馬鹿野郎

1. Was not a fool.; Was not an idiot.; Was not a silly person.

Past/Perfective
Negative
Polite
Formal Register