スマトラ だい蒟蒻 ごんにゃくでしょう
sumatoradaigonnyakudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of スマトラ大蒟蒻

1. Probably a giant konjac from Sumatra.

Polite
Presumptive
Conjecture