Green’s Dictionary of Slang

gold-digging n.

[gold-digger n.1 (2)]

of a usu. (young) woman, swapping sexual favours for material comforts; also attrib. (see cit. 1998).

[US]J. Lait Broadway Melody 84: Every girl who turns her eyes toward Broadway with visions of gold digging.
Redbook Nov. 44/1: She was financially embarrassed. So you can’t blame her for doing a little gold-digging [DA].
[Aus]D. Cusack Caddie 141: Two of the other barmaids [...] went in for a bit of gold-digging.
[Ire]P. McCabe Breakfast on Pluto 1: The gold-digging days of poor old darling poo poo puss are gone for ever.
[UK]J. Meades Empty Wigs (t/s) 279: Gold digging demands conviction... determination... the dissemblance of determination of course... qualities he quite lacked.