You dropped some cream on the back of your hand. You should lick it off of the back of your hand.
It is lick it off of the back of your hand or lick it off the back of your hand?
"off of" is a horrible abomination. There is never a reason to use it. "off" by itself always suffices.
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"off of" is a horrible abomination. There is never a reason to use it. "off" by itself always suffices.
(This is my opinion. I know that some people do not loathe "off of" as much as I do.)