Someone could be obsessed with books to the point where it's harming other aspects of their life. Although I'm sure the insult is often used as genuine anti-int

Someone could be obsessed with books to the point where it's harming other aspects of their life. Although I'm sure the insult is often used as genuine anti-intellectualism, I also understand why a society would not be impressed by someone who spends 15 hours a day reading Captain Underpants books.