Scufing or Scuffing: How To spell?
The word Scufing is misspelled against Scuffing, which is present continuous of "Scuff"
Scuffing has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Scu & ing which should not be misspelled with single 'F'
Wrong Spelling:  Scu-f-ing  Correct Spelling:  Scu-ff-ing 
Check more misspelled words of Scuffing to spell it correct.