keffal, n. — Green’s Dictionary of Slang

keffal n.

also keffel, keffil

[Welsh ceffyl, a horse; its use often implied that the horse was second-rate]

(UK Und.) a horse.

1690		‘Teague’ Teagueland Jests I 19: The Farrier [...] had provided an old rotten Keffill to accomodate the Spark.
c.1698		B.E. Dict. Canting Crew n.p.: Keffal a Horse.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue n.p.: Keffel, a horse (Welch).
1811		Lex. Balatronicum [as cit. 1785].
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue [as cit. 1785].
1859		Matsell Vocabulum.
1895		C. Crowe Aus. Sl. Dict. 41: Keffel, a horse.