Green’s Dictionary of Slang

gray n.

also grey

1. (US und.) a victim.

[US]Nat. Police Gaz. (NY) 29 Oct. 6/4: [They] entered into a conspiracy to rob the ‘grays’ at the fair.

2. (US black) a white person.

[US]Pittsburgh Courier (PA) 6 Aug. 11/1: [of a musical performance] We beat out a couple of slaves [...] one for the sepias and one for the grays.
[US]D. Burley Orig. Hbk of Harlem Jive 19: A lotta grays and some ungroovy spooks, for that matter, are going to get conked up.
[US]Hughes & Bontemps Book of Negro Folklore 484: grey : A white person. Nothing but greys go to the Stork Club.
[US]L. Hairston ‘The Winds of Change’ in Clarke Harlem, USA (1971) 320: She was pickin’ out somebody to cop a light from. She asked one of the grays.
[US]J. Hersey Algiers Motel Incident 333: The average gray, you know for your own self, is brought up with the prejudice instinct within him. He don’t want no black boy living over here.
[US]A. Young Snakes (1971) 35: Them some crazy niggers, damn! Talk about crazy, them some off-the-wall scogues all right. They dont even be making sense to one another much less to other boots and some of these simple-ass grays.
[US]J.L. Gwaltney Drylongso 21: These gray dudes went over there and couldn’t make these Vietnamese people do what they wanted to make them do, so they treated them like roaches.

3. (US campus) a black person who behaves like and associates with white people.

[US]Eble Campus Sl. Mar. 3: grey – a Black who acts like a white or who has a lot of white friends.

4. see grey n. (1)

5. see man in gray under man n.