The act of getting a book out on the train, tube bus or plane in order to avoid talking to the person next to you. Substitutes include a newspaper, phone or iPod.
Person one: "Blablabla isn't the weather terrible blablabla"
Person two: (gets book out thus giving Person one "The book off")
Person one stops talking.
by 0xxMillyxx0 September 20, 2009
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An adjective to refer to something of incredible value. A deal so ludicrous that it makes you wonder how a store could possibly be profiting from selling a product at such a low amount. The term originates from the second hand store chain in Japan known by the same name.
Person1: 10$ for 30 mint condition volumes of manga!? How is this even possible?
Person2: Yeah man, that's quite the Book Off deal.
by MainProtagonist November 3, 2020
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When talking to someone on the bus, you say something inappropriate and they lose interest in the conversation.

They then proceed to get a book out and read it, leaving you thoroughly ignored.
Met this girl on the bus today, totally made me book off.
by Smackaine April 8, 2009
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When you have memorized all of your lines.
Girl 1: Are you off book yet?
Girl 2: No.
by theatreslang July 16, 2020
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