Home › Words › F › fistbumpfistbumpfistbump means to bump fists in greeting or celebration.EtymologyFrom fist + bump.verbTo bump fists in greeting or celebration.e.g.““Let's order a pizza.” He and Markie fistbumped hello.” — 2012, Gary Paulsen, Flat Broke: The Theory, Practice and Destructive Properties of Greed, page 8:Definitions & examples from Wiktionary (CC BY-SA 3.0).