ex-dub Share definition Flag A former member of the Jehovah Witness cult.Someone who has woken up from a coma. What I was a dub? I did what, I thought what? I must have been brain dead, thank god I'm an ex-dub now! ex-dub by Ithink/Iam August 11, 2009 0 0 Get merch Get the ex-dub mug. Buy Now — $32.95 See more merch