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