Green’s Dictionary of Slang

(US) foreign, spec. Italian or East Asian; by late 20C+ usu. Korean or Vietnamese; cit. 1967 refers to any sort of foreigner.

1947		(con. 1944) J.H. Burns Gallery (1948) 265: These Gook wimmin, the mess sergeant said. It’s so easy with em.
1959		(con. WWII) B. Cochrell Barren Beaches of Hell 39: ‘Gook money,’ Flynn grinned.
1961		(con. early 1950s) J. Peacock Valhalla 50: Excluding Korea, of course. There he drank gook booze.
1967		G. Legman Fake Revolt 24: Puerto Rico, Hamburg, or Las Vegas, or some other gook country where prostitution and drugs are wide-open.
1978		J. Webb Fields of Fire (1980) 138: There’s a gook barber outside the compound.
1986		R. Campbell In La-La Land We Trust (1999) 61: It’s a gook corpse and it’s got a butterfly on its ass.
1990		S. Morgan Homeboy 21: The gook pharmacy Rooski and I boosted last week.
1998		K. Anderson Night Dogs 48: [of Japanese] ‘Run, you gook motherfuckers [...] Didi fucking mau’.
2003		N. Green Angel of Montague Street (2004) 20: I don’t wanna hear any of that gook [i.e. Oriental] bullshit you’re into.