Gwermo Share definition Flag Douchy dudes with gelled up hair and tight clothing with a douche bag personality. They are usually obsessed with themselves and think their the shit. "Dude did you just see that Gwermo walk into Aeropostale?" Gwermo by Flowtogo October 30, 2011 0 0 Get merch Get the Gwermo mug. Buy Now — $32.95 See more merch