Definition of off of in English:

off of

preposition

non-standard
  • Off; from.

    ‘I pinched this next bit off of a website somewhere’
    ‘bullets were bouncing off of the shield’
    • ‘She smiled brightly as she got off of her bicycle and skipped over and on to the porch.’
    • ‘Being able to bounce my ideas off of other like-minded people was even more of a relief.’
    • ‘Do not tear labels off of medication or cleaners.’
    • ‘Be careful not to make wholesale changes to a campaign off of a small amount of data.’
    • ‘Seth proceeded to get off of the couch.’
    • ‘People start pulling threads off of it.’
    • ‘This task took a bit longer than expected because my friend kept trying to shave a few cents off of the exchange rate to his benefit.’
    • ‘I think that took some of the pressure off of me.’
    • ‘It also takes some of the heat off of Rachel, who is given nothing to do of merit.’
    • ‘The second-year player must step up and work harder to take pressure off of his teammates.’
    • ‘We shouldn't be making money off of our everyday conversations.’

Usage

Off of is often used in place of the preposition off in contexts such as she picked it up off of the floor (compared with she picked it up off the floor). Logically parallel to the standard out of, the phrase is recorded from the 16th century (it was used by Shakespeare) and is widely accepted in American English. Nevertheless, it is regarded as incorrect in standard modern British English