Sliping or Slipping: How To spell?
The word Sliping is misspelled against Slipping, which is present continuous of "Slip"
Slipping has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings sli & ing which should not be misspelled with single 'P'
Wrong Spelling:  sli-p-ing  Correct Spelling:  sli-pp-ing 
Find more wrongly spelled words of Slipping to spell it well.