If you really want to hear about it, the first thing you'll probably want to know is where I was born, an what my lousy childhood was like, and how my parents were occupied and all before they had me, and all that David Copperfield kind of crap

from J.D. Salinger – The Catcher in the Rye (Chap. 1) on Rap Genius

Meaning

J.D. Salinger hasn’t even finished the first sentence and he’s already characterizing Holden Caulfield (the narrator) as

A bit self-absorbed

As if I really want to hear about it, Holden.

Isolated from his family

Specifically his parents (“occupied and all”), possibly due to his “lousy childhood.” Also, the reference to the Charles Dickens character David Copperfield of the near eponymous novel supports this claim (David Copperfield was sent away from home to a boarding school by his mom and step-dad. Holden also was sent to a boarding school away from home).

Intelligent

The offhand allusion to David Copperfield speaks for itself.

A potty mouth

Crap. The frequent swearing in the novel has placed it consistently among the most banned books in American school libraries.

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