じりめんじゃこでしょう
縮緬雑魚でしょう
jiri menjakodeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of ちりめんじゃこ

1. Probably small fry.; Probably insignificant.

Polite
Presumptive
Conjecture
Usually Written in Kana