Green’s Dictionary of Slang

a prostitute.

1579		S. Gosson School of Abuse (1868) 36: Euery Vawter in one blinde Tauerne or other, is Tenant at will, to which shee tolleth resorte.
1624		Fletcher Wife for a Month IV i: ‘There be young Ladies Both fair and honourable, that would leap to reach ’em, And leap aloft too.’ ‘Such are light enough; I am no Vaulter.’.
1635		H. Glapthorne Hollander I i: Was it not I That first advis’d you to set up a Schoole For Female vaulters, and within pretence Of giving Physicke, give them an over-plus To their disease.
1655		‘Rapture’ in Wardroper (1969) 106: Then vault and do some vaulter’s knack That speaks me man and shows my back.
1668		‘Whores’ Petition to the London Prentices’ in Ebsworth Bagford Ballads (1878) II 503: When they had spoil’d the Vaulters of their Tools, / They then must go to pull down Vaulting-Schools.