Duro Ask Urban Dictionary about Duro Share definition Flag Obscure, possibly archaic Puerto Rican slang for "badass." Yo, you see how he just snuffed that motherfucker? Shit was fuckin duro, man. Duro by boricua_wordsmith May 10, 2011 0 0 Duro Merch Get the Duro mug. Buy Now — $32.95 See more merch