Slubing or Slubbing: How To spell?
The word Slubing is misspelled against Slubbing, an adjective meaning "from Slub."
Slubbing has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Slu & ing which should not be misspelled with single 'B'
Wrong Spelling:  Slu-b-ing  Correct Spelling:  Slu-bb-ing 
Check more misspelled words of Slubbing to spell it correct.