必勝 ひっしょう不敗 ふはいじゃなかったです
hisshōfuhaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 必勝不敗

1. Wasn't guaranteed victory/success.; Wasn't always winning/unbeatable.

Past/Perfective
Negative
Polite
Casual Register