strapping, n. — Green’s Dictionary of Slang

strapping n.

[SE strapping, a beating; i.e. image of intercourse as violence]

sexual intercourse; thus strap v., to have sexual intercourse.

c.1698		B.E. Dict. Canting Crew n.p.: Straping, c. lying with a Wench.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1770		T. Chatterton Revenge I ii: If my courage holds, egad, I’ll strap her.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.