dunnock, n. — Green’s Dictionary of Slang

dunnock n.

also dunnek, dunney

[SE dun, brown, the colour of many cows]

(UK Und.) a cow.

1703		Hell Upon Earth 5: Dunnock, a Cow.
1708		J. Hall Memoirs (1714) 12: Dunnock, a Cow.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions .
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum.
1887		Cornishman 6 Jan. 4/3: Specimens of mumpers' or tramps' talk [...] dunnux, a cow.
1895		Crowe Aus. Sl. Dict. 26: Dunnek, a cow.