subs. (old).A gamesters money-lender.
1609. DEKKER, Lanthorne and Candlelight. The GUL-GROPER is commonly an old Mony-monger, who having travaild through all the follyes of the world in his youth, knowes them well, and shunnes them in his age; his whole felicitie being to fill his bags with golde and silver.
c. 1696. B. E., A New Dictionary of the Canting Crew, s.v. GULL-GROPER. A Bystander that Lends Money to the Gamesters.
1785. GROSE, A Classical Dictionary of the Vulgar Tongue, s.v.