Green’s Dictionary of Slang

of a woman, to act in a promiscuous manner; to work as a prostitute.

1530		Palsgrave Lesclarcissement de la Langue Francoyse n.p.: Verbes: Rampe, I playe the callet.
1550		Udall Ralph Roister Doister II iv: Is all your delight and joy / In whisking and ramping abroad, like a Tom-boy?
1611		R. Cotgrave Dict. of Fr. and Eng. Tongues n.p.: Gadriller. (A wench) to raump, or play the rig.
1688		‘Session of Ladies’ in Wilson Court Satires of the Restoration (1976) 211: Villiers, who passed for a Maid of the Queen, Came ramping along to supply her great need.
1722		‘Whipping-Tom’ Immodest Wearing of Hoop-Petticoats I 35: ’Tis not Money [...] Swearing, Poysoning, Ramping.