Flub a sub Share definition Flag Becoming confused during a high stress situation, causing the confused person to shout out incoherently. "I'm lost and my gps doesn't work.....I think I'm west on Flub a sub!" Flub a sub by motorola2009 October 14, 2010 0 0 Get merch Get the Flub a sub mug. Buy Now — $32.95 See more merch
