Diamond Jim Brady dia·mond·jimb·rady uncommon noun 1. United States financier noted for his love of diamonds and his extravagant lifestyle (1856-1917) SynonymsBradyJames Buchanan BradyDiamond Jim BradyDiamond Jim Related words Broader terms financier WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.