Sub Z3r0 Share definition Flag Wannabe loser who thinks they are l33t for knowing what 1337 is. Dude, you fail so hard at being l33t, you make Sub Z3r0 look like a programmer. Sub Z3r0 by TacticalFail June 26, 2007 0 0 Get merch Get the Sub Z3r0 mug. Buy Now — $32.95 See more merch