On Code Switch on NPR and in the book I reference, it was a time that referred to poor whites in the South: "Cracker," the old standby of Anglo insults was first noted in the mid 18th century, making it older than the United States itself. It was used to refer to poor whites, particularly those inhabiting the frontier regions of Maryland, Virginia and Georgia. It is suspected that it was a shortened version of "whip-cracker," since the manual labor they did involved driving livestock with a whip (not to mention the other brutal arenas where those skills were employed.) Over the course of time it came to represent a person of lower caste or criminal disposition, (in some instances, was used in reference to bandits and other lawless folk.)

But it was also used in King John in Shakespeare's verse: One character refers to another as a craker — a common insult for an obnoxious bloviator.

What craker is this same that deafs our ears with this abundance of superfluous breath?

"It's a beautiful quote, but it was a character trait that was used to describe a group of Celtic immigrants — Scots-Irish people who came to the Americas who were running from political circumstances in the old world,"

Very long history with this term.