Green’s Dictionary of Slang

Yank adj.

1. American.

1873		S.W. Payne Behind the Bars 145: I t’ink you’s one dem Yank’ fellers.
1900		Flynt & Walton Powers That Prey 255: A Yank copper in London offered me good money ’f I’d work for him.
1936		Hotspur 11 Jan. 43: The Trans-Atlantic House, better known as Yank House.
1944		Naugatuck Dly Times (CT) 8 Nov. 8/5: Some of General Hodges’ Yank soldiers [...] are fighting a grim to to toe slugfest in Hurtgen forest.
1959		C. MacInnes Absolute Beginners 22: Inside it looked cool and costly [...] Yank mags and indoor plants.
1962		K. Amis letter 20 June in Leader (2000) 602: What more natural than that I should be sendin a Leter to my Old yank Pall roo-kaiser what a Swel kidd he is and no Eror.
1968		A. Burgess Enderby Outside in Complete Enderby (2002) 304: It’s mostly Yank camps, junkies, had-no-lucks.
1978		Maledicta II:1+2 (Summer/Winter) 119: The Telegraph author [...] finds it convenient to deny much familiarity with things yank.
1985		B. Humphries Traveller’s Tool 18: I bumped into a Yank delegate who’d never even heard of Australia.
1995		D. Lodge Therapy (1996) 261: He doesn’t help his cause by referring to them contemptuously as ‘them yank poofters.’.
2000		Guardian G2 22 Feb. 17: There’s always overblown Yank rockers Smashing Pumpkins across town the same night.

In derivatives

Yank-crazy (adj.)

obsessed with Americans.

1946

S. Jackson Indiscreet Guide to Soho 49: He is a Yank-crazy youngster who chews gum incessantly.

In compounds

Yank tank (n.) (also Yank)

(N.Z.) a large US car.

1963		N. Dunn Up the Junction 91: Lovely motors, these Yanks.
1988		McGill Dict. of Kiwi Sl. 127/1: yank tank large American car.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
2016		D. Whish-Wilson Old Scores [ebook] ‘Or I could buy you a beer, while you tell me how you managed to get the Yank tank halfway across the city?’.