Fibing or Fibbing: How To spell?
The word Fibing is misspelled against Fibbing, which is present continuous of "Fib"
Fibbing has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Fi & ing which should not be misspelled with single 'B'
Wrong Spelling:  Fi-b-ing  Correct Spelling:  Fi-bb-ing 
Find more wrongly spelled words of Fibbing to spell it well.