Whifling or Whiffling: How To spell?
The word Whifling is misspelled against Whiffling, which is present continuous of "Whiffle"
Whiffling has double "ff" is mispronounced as "f"Remember double 'FF' in between the strings Whi & ling which should not be misspelled with single 'F'
Wrong Spelling:  Whi-f-ling  Correct Spelling:  Whi-ff-ling 
Find more wrongly spelled words of Whiffling to spell it well.