BICO Share definition Flag An acronym standing for "Black In Color Only." "Yo, what's wrong with Tyrell? Dude can't dance for shit.""Don't sweat it. Brother's a full-on BICO." BICO by GreatRedShark April 18, 2010 0 0 Get merch Get the BICO mug. Buy Now — $32.95 See more merch