one for the book
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one for the (record) book(s)
A remarkable, unusual, and unexpected event, occurrence, or piece of news. Mr. Literature Snob reading a trashy romance novel? Now that's one for the books! A: "After the concert, I ran into the singer at a pub down the road from the venue. It turns out his mother went to the same school as mine!" B: "Wow, there's one for the record books!"
one for the (record) books
An outstanding, memorable, or record-breaking event or achievement. Wow, you finished a 32-ounce steak in less than five minutes? That's one for the record books! You should have seen your faces when Dad popped out of the bushes to scare you! Boy, that was one for the books.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
one for the booksomething particularly noteworthy. informal
The expression is based on the notion of a sporting or other achievement that merits a permanent record.
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