Green’s Dictionary of Slang

Harlem adj.

[proper name Harlem, the centre of New York City’s black community]

(US) used in derog. senses to emphasize the negative stereotypes of African-Americans as lazy, larcenous, stupid, vulgar etc; in combs. below.

In compounds

Harlem credit-card (n.)

(US) a piece of hose used to siphon petrol from another car into the tank of one’s own.

[US]Maledicta III:2 168: Harlem credit cardn Siphon hose for stealing gasoline.
Harlem measles (n.)

(US black) an unspecified disease; ? an STD.

[US]‘Digg Mee’ ‘Observation Post’ in N.Y. Age 26 Apr. 9/7: What are the ‘Harlem Measles?’...beware of them, chicks.
Harlem slums (n.)

(N.Z. prison) a wing housing the tougher inmates.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 85/1: Harlem Slums, the n pl. see street, the.
Harlem sunset (n.) [the stereotyped use of razors in black-on-black fights]

(US) blood pouring from razor slashes.

[US]R. Chandler Farewell, My Lovely (1949) 20: One time there was five smokes carved Harlem sunsets on each other down on East Eighty-four.
[US]T. Dorsey Cadillac Beach 258: ‘What jumps into your head?’ [...] ‘Chicago overcoats, Harlem sunsets, a jorum of skee, a chippie with boss getaway sticks [...]’.
Harlem taxi (n.)

(US police) a large, fin-tailed, brightly coloured car.

[US]D. Dempsey ‘Lang. of Traffic Policemen’ in AS XXXVII:4 268: Harlem taxi, n. An oversized, tail-finned, flamboyantly colored passenger car.