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Adjective meaning consistently and irresistibly interesting. Typically refers to a book that is so well written and entertaining as to be difficult to (literally) put down and pause away from.
Have you read the latest Harry Potter? It's unputdownable.
by Count3D July 21, 2007
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2
A stupid word someone made up. Flipping Annoying.

The word frienemies is a good word. Unputdownable is a word a bookish drama queen uses to try and sound smart. It's annoying.
by Don'tUSeYouReallzzzNames July 19, 2018
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3
having the ability of being unable to put down - comulsive really.
"Richard Hammond's new book is unputdownable, 'tis quite frankly awesome"
by Moogly October 18, 2007
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