Green’s Dictionary of Slang

1. (also yomo) a black street boy.

1977		P. Hamill Flesh and Blood (1978) 26: The whites stare at us one way, wondering what I’m doing with a yom. The blacks stare at Kirk.
1980		(con. 1971) W. Sherman Times Square 52: One dumpy Italian talking about ‘good wops’ and ‘yoms.’ [...] ‘The word ‘yom,’ said Gray with a professorial air, ‘is Sicilian patois for a member of the black race. It is derived from the Italian word for eggplant. Mulanyom. Eggplants are black, you see.’.
1992		R. Price Clockers 40: We’re just sniffing around, bullshitting with the yoms. [Ibid.] 212: ‘What’s this guy, white or black?’ ‘Yomo.’.
1997		(con. 1970s) G. Pelecanos King Suckerman (1998) 159: Just sold a Spectracon receiver to some yom.

2. a black woman.

1978

R. Price Ladies’ Man (1985) 111: He married a yom.