off of

• (UK) IPA^(key): /ˈɒfəv/, (reduced, before a consonant) /ˈɒfə/
• (US) IPA^(key): /ˈɑfəv/

off of

1. (now colloquial) Off; from, off from. [from 15th c.]

   Antonym: onto

   The story is based off of historical accounts.

   • 1591 (date written), William Shakespeare, “The Second Part of Henry the Sixt, […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies. […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act II, scene i]:

     Card. What, art thou lame?
     Simpc. I, God Almightie helpe me.
     Suff. How cam'st thou so?
     Simpc. A fall off of a Tree.

   • 1741, [Samuel Richardson], Pamela: Or, Virtue Rewarded. […], volume (please specify |volume=I to IV), London: […] C[harles] Rivington, […]; and J. Osborn, […], →OCLC:

     Do, my dearest child, get me off of this difficulty, and I can have no other […] .

   • 1870–1871 (date written), Mark Twain [pseudonym; Samuel Langhorne Clemens], chapter XX, in Roughing It, Hartford, Conn.: American Publishing Company [et al.], published 1872, →OCLC, page 151:

     The coach bounced up and down in such a terrific way that it jolted the buttons all off of Horace’s coat, […]

   • 1928 September 28, “Eye of Gawd”, in Time:

     "The green curtains that hung there for years and years... have been taken down and the blood-red cardinal velvet curtains have been hung up, and they have taken the green top off of the President's desk and put a red one on that..."

   • 1967, Bob Crewe / Bob Gaudio, Can't Take My Eyes Off You:

     You're just too good to be true / I Can't take my eyes off of you.

• The use of off of as a preposition is now considered tautological or incorrect by some usage guides and is not suitable for formal or business use. Off of can be replaced with on, from or off: "This is based on (off of) his first book"; "I got the information from (off of) the Internet"; "He took a paper off (off of) his desk".