縮緬 じりめん雑魚 じゃこじゃなかったです
jiri menjakojanakattadesu

Noun
Desu Copula

The polite, past negative form of 縮緬雑魚

1. Wasn't a small striped fish.; Wasn't a common/insignificant person.

Past/Perfective
Negative
Polite
Casual Register