"Well, you ain’t in your country now. You’re in California, an’ we don’t want you goddamn Okies settlin’ down."
Ma’s advance stopped. She looked puzzled. "Okies?" she said softly. "Okies."

– John Steinbeck

The Grapes of Wrath, Chapter 18. Ma Joad is stunned by the level of prejudice shown by a California police officer, who tells her that "Okies" are not wanted in the Golden State.