Green’s Dictionary of Slang

Polack adj.

also Polock

pertaining to Poles or Polish culture.

[UK]Shakespeare Hamlet V ii: You from the Polack wars, and you from England, Are here arrived.
[US] ref. in H. Rawson Dict. of Invective (1991) 307: Karl Marx once threatened to sue a London newspaper, The Daily Telegraph, which he described as being owned by ‘polack Jews’ (letter to Freidrich Engels, 2/9/1860, in Saul Padover, Karl Marx, An Intimate Biography, 1980).
[US]S. Ford Torchy 143: You an’ yer Polack friends may walk down.
[US]E. Ferber ‘Un Morso doo Pang’ in One Basket (1947) 72: You’d go round Looking like one of those Polack women.
[US](con. 1917) J. Stevens Mattock 230: The scowl of the big black Polack corporal was as tough as the first sergeant’s had ever been.
[US]J.T. Farrell Gas-House McGinty 223: I got a Polack jane knocked up.
[US]A. Lomax Mister Jelly Roll (1952) 242: Some of those Polock cops they have in Washington came in.
[US]W.R. Burnett Little Men, Big World 168: If that damned Polack brat would shut up for two minutes so I could hear myself think.
[US]Hughes & Bontemps Book of Negro Folklore 381: O mah babe, way down in Polock town.
[US]L. Bruce Essential Lenny Bruce 16: Minus two Yid spic Polack funky spunky Polacks.
[US]J.G. Dunne True Confessions (1979) 20: People from tough mick and Polack neighborhoods.
[US]D. Woodrell Muscle for the Wing 37: Parma, Ohio, a bohunk, polack, et cetera section of Cleveland.
[US]R. Campbell Wizard of La-La Land (1999) 20: He tried to stiff her [...] calling her a Catholic Polack bitch and slapping her in the face.
[US]T. Robinson ‘So Long, Johnnie Scumbag’ in Dirty Words [ebook] ‘Polka? I don't know nothin' about no Polack dancing’.

In compounds

Polack town (n.)

(US) the Polish community within an urban area.

[US]C. Gibson ‘Levee Camp Moan’ 🎵 Down the alley, to the levee, then to Polack town pretty mama.
[US]N. Algren Never Come Morning (1988) 207: Fin’ll I put her on the line up in Polacktown.
Patients as People 9 74: In many industrial cities in the East and Middle West people who immigrated from Poland are still popularly characterized as ‘Polacks’ and the section of the city in which they are concentrated is often known as ‘Polack Town’.
[US]S. Longstreet Straw Boss (1979) 279: A poor, uneducated slob of a Polack mill town kid.
[US]Maledicta IX 59: Polack Town n [C] Polish community within an urban area.
[US]Simon & Alvarez ‘Backwash’ Wire ser. 2 ep. 7 [TV script] How many fuckin’ Sobotkas can there be? Even down here in Polacktown?