George Bryan Brummell geor·geb·ryanb·rummell uncommon noun 1. English dandy who was a fashion leader during the Regency (1778-1840) SynonymsBrummellGeorge Bryan BrummellBeau Brummell Related words Broader terms dandy WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.