Green’s Dictionary of Slang

buttock-ball n.

[buttock n. + SE ball; the ‘Buttock Ball in St Giles’, held weekly and described by Ned Ward, A Compleat and Humorous Account of All the Remarkable Clubs and Societies (1709) as ‘this School of Venus’ and a ‘Diabolical Academy’, is attended by ‘a mottl’d Diversity of Rakes, Beaus, grave Hypocrites, and Apprentices; Pimps, Bullies, Stallions, Valets, Butlers, and disguis’d Livery-Men; Thieves, Gamesters, Sweetners, Town Traps and Highwaymen; Procurers, Punks, Cooks, Jades and Chambermaids; damn’d filing Whores, sill Sows and Fireships; lewd Widows, wicked Wives and whorish Daughters; these Larded, by Chance, with here and there, a maid, but the fewest of that Sport of any.’ Ward suggests that the first such dance was held ‘by the Cole-Yard Gateway into Drury-Lane’, then a centre of prostitution, c.1670]

1. [late 17C–early 18C] a dance at which the chief aim is to find sexual partners, the 18C equivalent of a meat market n. (1)

2. [late 18C–early 19C] sexual intercourse.