Green’s Dictionary of Slang

1. esp. of a woman, wanton, sexually forward.

1608		J. Withals Dictionarie in Eng. and Latine n.p.: Cockish, lustie, leacherous, salax.
c.1698		B.E. Dict. Canting Crew n.p.: Cockish, wanton, uppish, forward.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1847–81		Halliwell Dict. of Archaic and Provincial Words I.
a.1948		(con. early 1930s) C. McKay Harlem Glory (1990) 39: They drink [hooch] because it’s cheap and to feel cockish.

2. (W.I.) of liquor, strong; usu. made from fermented sugar cane.

1932

C. McKay Gingertown 230: Cockish liquor sweet boy, O chop the sugar-cane. / Drink it down, drink it down.