Green’s Dictionary of Slang

promiscuous, whorish.

1699		N. Ward London Spy VI 140: What do you think [...] [t]his buttocking brimstone came hither for?
1729		Life of Thomas Neaves 31: Those Buttocking Frows, that for a Lie buxum, a Hog, or half a Slat, this is six-pence, a Shilling, or half a Crown, shall turn up their Scut to every Porter, Link-boy, Tinker, or Carman.
1747		Life and Character of Moll King 12: My Blos has nailed me of mine [handkerchief]; but I shall catch her at Maddox’s Gin-Ken [...] and if she has morric’d it, Knocks and Socks, Thumps and Pumps, shall attend the Froe-File Buttocking B---h.