Source : Webster's Revised Unabridged Dictionary (1913)

Cub \Cub\, v. t. & i. [imp. & p. p. {Cubbed} (k[u^]bd); p. pr. &
   vb. n. {Cubbing}.]
   To bring forth; -- said of animals, or in contempt, of
   persons. ``Cubb'd in a cabin.'' --Dryden.

Source : WordNet®

cubbing
     See {cub}

cub
     n 1: an awkward and inexperienced youth [syn: {greenhorn}, {rookie}]
     2: a male child (a familiar term of address to a boy) [syn: {lad},
         {laddie}, {sonny}, {sonny boy}]
     3: the young of certain carnivorous mammals such as the bear or
        wolf or lion [syn: {young carnivore}]
     [also: {cubbing}, {cubbed}]

cub
     v : give birth to cubs; "bears cub every year"
     [also: {cubbing}, {cubbed}]