Green’s Dictionary of Slang

1. a walk.

1859		Hotten Dict. of Modern Sl. etc.
1880		D.W. Barrett Life and Work among Navvies 41: When a man gets tired of walking a long distance to his work [...] if he wishes to express himself in the approved slang phraseology, he will do it thus: – ‘I can’t stand this Duke of York to my Russian-Turk’.

2. talk.

1873		Sl. Dict.
1960, 1975		Wentworth & Flexner DAS.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.

3. a fork.

1873		Sl. Dict. 153: ‘Duke of Yorks,’ forks = fingers.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 84: Duke Of York; Fork.
1953		J. Franklyn Cockney 291: ‘Duke of Yorks’ rhyming on ‘forks’.
1969		S.T. Kendall Up the Frog.
1971		J. Jones Rhy. Cockney Sl.
1981		P. Wright Cockney Dialect and Sl. 103: Dook of York ‘fork’.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.

4. in pl., fingers [= fork n.¹ (3)].

1873		Sl. Dict. 153: ‘Duke of Yorks,’ forks = fingers.
1957		G. Kersh Fowlers End (2001) 99: She can make that pianner talk, once she gets ’er Duke-o’-Yorks on it.
1960		J. Franklyn Dict. of Rhy. Sl.
1987		J. Ciardi Good Words 317: Duke of Yorks, fingers (used as forks).

5. chalk.

1938		L. Ortzen Down Donkey Row 11: Duke of York – Chalk.
1960		J. Franklyn Dict. of Rhy. Sl.
1971		J. Jones Rhy. Cockney Sl.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.

6. a cork.

1960		J. Franklyn Dict. of Rhy. Sl.
1971		J. Jones Rhy. Cockney Sl.

7. pork.

1969		S.T. Kendall Up the Frog.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.