spiffing spif·fing UK/ˈspɪfɪŋ/ US/ˈspɪfɪŋ/ uncommon dated uk adjective 1. excellent or splendid “that” Similarsuperior WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.
