Mufed or Muffed: How To spell?
The word Mufed is misspelled against Muffed, which is past tense of "Muff"
Muffed has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Mu & ed which should not be misspelled with single 'F'
Wrong Spelling:  Mu-f-ed  Correct Spelling:  Mu-ff-ed 
Check more misspelled words of Muffed to spell it correct.