Green’s Dictionary of Slang

1. a Yorkshireman; also in direct address.

1818		Egan Boxiana II 301: Yorky did not appear wholly without judgment.
1865		Leaves from Diary of Celebrated Burglar 113/1: Blast my eyes if i’m going to sit here and hear a challenge like that ere ’ithout taking it up — go ahead Yorky. Cut and I’ll follow.
1893		J. Demarr Adventures in Aus. 71: I was always called ‘Yorky,’ the name given to all Yorkshiremen.
1912		Bulletin (Sydney) 10 Oct. 16/3: But the simple scions of John Bull cited by ‘Snell’ and ‘Pick’ are Bernard Shaws and Solomons compared with a shock-headed, open-mouthed Yorkshire yokel, whose hoofs hit the Fremantle quay a couple of Orient boats back. Yorky’s appalling brainlessness and general goatocity led him to hit beautiful bother early.
1933		M. Marshall Tramp-Royal on the Toby 107: I turned my back on the hard-up Yorkies and headed eastward.
1938		J. Curtis They Drive by Night 149: Who knows but that bleeding Yorky didn’t rumble him and put him away.
1953		J. Franklyn Cockney 275: People from anywhere north of the River Trent are Yorkies, Geordies, or Jocks.
1964		J.A. Lee Shiner Slattery 151: Had not the rhymester Con Regan written, ‘And the Flour of Wheat busted the phizz of Yorky Jimmy Wall, / But Mighty Jimmy Hennessy was the conqueror of them all’?

2. a Yorkshire terrier.

1993

T. Jones Pugilist at Rest 119: My sister Dana tells me that Bocassio’s bull terrier, Duran, has killed a neighbor’s Yorkie.