uncle skeeb Share definition Flag A very common term used for Cocaine by local downeast mainers. It is a very humerous term. Dude, fuckin whers all the fuckin uncle skeeb at man, fucking im jonesin pretty fuckin bad dude. uncle skeeb by manning91 April 20, 2010 0 0 Get merch Get the uncle skeeb mug. Buy Now — $32.95 See more merch