Green’s Dictionary of Slang

a woman’s virginity.

c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Run Goods. a Maidenhead, or the commodity of a modest Girl, which has never been entered.
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn) n.p.: Run Goods. A maidenhead, being a commodity never entered.
1811		Lex. Balatronicum.
1812		Spirit of Irish Wit 114: Mr Mason [...] thrust his hand under her lower garments. Monica [...] said, ‘Oh, by J—s, Mr Commissioner, you’ll find no run goods there, for everything has been fairly entered’.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1838		(con. mid-18C) Crim.-Con. Gaz. 17 Nov. 99/3: He, in the spirit of gallantry, touched her lower garments. Monica [...] said, ‘Och, by Jasus! Mr Commissioner, you are upon a wrong sent [sic] — you’ll find no run goods there,. everything has been fairly entered’.
1842		Flash (NY) 4 Sept. n.p.: As no goods were found upon her, but what had been fairly entered, no damage was done.