Dufer or Duffer: How To spell?
The word Dufer is misspelled against Duffer, a noun meaning "A peddler or hawker, especially of cheap, flashy articles, as sham jewelry; hence, a sham or cheat."
Duffer has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Du & er which should not be misspelled with single 'F'
Wrong Spelling:  Du-f-er  Correct Spelling:  Du-ff-er 
Check more misspelled words of Duffer to spell it correct.