うまおうとじゃありませんでした
馬大頭じゃありませんでした
uma ōtojārimasendeshita

Noun
Desu Copula

The polite, past negative form of おにやんま

1. Was not a horse's head.; Was not an idiot.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana