芋掘 いもほ坊主 ぼうずでしょう
imohoribōzudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 芋掘り坊主

1. Probably a young, bald monk.; Probably a child digging for sweet potatoes.

Polite
Presumptive
Conjecture