What is bucchy-sois?

Answer 1

I never heard that, "sois" means "to be" (subjonctive), but bucchy is not french at all, maybe a strange "Franglish" word from french canadian, I don't know

Answer 2

There is no known term or concept called "bucchy-sois" in English. It is possible that it is a misspelling or a term from another language. Can you provide more context or information to help clarify?