Does foff mean grandfather in another language?

"Foff" is not a word that commonly refers to "grandfather" in any language. It's possible that you might be thinking of a word that sounds similar, or perhaps a misspelling.

Could you provide more context?

* What language are you thinking of?

* How did you come across the word "foff"?

* What was the context of the word's use?

With more information, I might be able to help you figure out the correct word.