nub cub Posted in N Best definition nub cub a baby or verry young noob/nub. person 1: dude i got 25 headshot in a row on this 7 year old in halo 3 last nite. person 2: wow what a nub cub. How satisfied are you with the definition? Looking for nub cub meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 114 times.