Green’s Dictionary of Slang

1. (also gingling boy, jingleboy) a sovereign (£1 sterling); thus any gold coin.

1600		J. Day Blind Beggar of Bednall-Green Act V: Come ole fellow bring thy white Bears to the stake, and thy yellow gingle boys to the Bull-ring.
1611		J. Cook Greenes Tu Quoque Scene iv: spend: Dice or drincke, heere’s forty crownes: as long as that will last, any thing. rash: Why, there spoke a gingling Boy.
1622		Massinger Virgin-Martyr II iii: The sign of the gingleboys hangs at the door of our pockets.

2. (also gingle-cash) one who possesses gold coins.

1632		R. Brome Covent-Garden Weeded I i: Mystriss, there is a Gallant now below, a Gingle boy indeed, that has his pockets full of crowns.
1751		W. Kenrick Falstaff’s Wedding (1766) II viii: It lies now in master Gingle-cash, the banker’s hands.