Green’s Dictionary of Slang

1. (Aus.) sodomy.

1989

Partridge & Beale Concise Dict. Sl.

2. (US black) sexual intercourse.

1961

R. Gover One Hundred Dollar Misunderstanding 137: I gotta teech him how t’go slow an pritty when he wanna play turnabout.

3. (US black) a male homosexual.

1961

C. Himes Pinktoes (1989) 145: Wouldn’t that be the lick that killed Dick, race leader becomes turnabout?