Off of

Off of.—“There were ten yards of the cloth before I cut this piece off of it.” Say “before I cut this piece off it,” or “from it.”

off of : The preposition off, when noting origin and used in the sense of from is frequently followed most ungrammatically by of. No well educated person would say “I got these eggs off of Farmer Jones,” nor would they “buy a steak off of the butcher” but “of” or “from” him. Off should not be used of a person, where from would suffice. You take a book from, not off, your friend; who may take it off a shelf. You do not even, in correct speech, take a contagious disease off him, as though it were something visible and tangible, and were bodily removed from his person.