dog-eared

adjective2

1. •
   Of a page in a book or other publication: having its corner folded down, either due to having been read many times, or intentionally as a sort of bookmark.

   • By thumbing to the dog-eared pages, she quickly found the items in the catalog she wanted to order.
   • The pages in his favourite book were dog-eared from years of reading it at bedtime.
2. •
   (figurative) Ragged, worn-out; also, hackneyed, tired.

   • This is the old, old pain come home once more, Bent down with answers wild and very lame For all my delving in old dog-eared lore That drove the Sages mad. And boots the world Aught for their wisdom? — 1919