However, the phrase can also carry a more figurative meaning, particularly in the context of the novel "The Outsiders".
In "The Outsiders," the phrase is used to describe Ponyboy Curtis, a character who is often seen reading. This is in contrast to the other greasers, who are more interested in fighting and partying. The phrase "always got your nose in a book" highlights Ponyboy's intellectualism and tendency towards solitude, setting him apart from the other greasers.
So, while the literal meaning is simply about frequent reading, in the context of "The Outsiders", the phrase carries a deeper meaning about Ponyboy's personality and social isolation.