Green’s Dictionary of Slang

(US black) a derog. term for a white person, esp. a racist.

1975		G. Jones in C. Major Calling Wind 375: My daddy hate hoogies (up north I hear they call em honkies) [HDAS].
1988		C.E. Lincoln The Avenue, Clayton City (1996) 148: All them rednecks an’ hoogies what come into town to see the trial, well, they wasn’t ’bout to go home ’til some po’ nigger had been made to suffer for their inconvenience and disappointment.