Stufing or Stuffing: How To spell?
The word Stufing is misspelled against Stuffing, a noun meaning "A mixture of oil and tallow used in softening and dressing leather."
Stuffing has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Stu & ing which should not be misspelled with single 'F'
Wrong Spelling:  Stu-f-ing  Correct Spelling:  Stu-ff-ing 
Check more misspelled words of Stuffing to spell it correct.