Slipy or Slippy: How To spell?
The word Slipy is misspelled against Slippy, an adjective meaning "Slippery."
Slippy has double "pp" is mispronounced as "p"Remember double 'PP' in between the strings sli & y which should not be misspelled with single 'P'
Wrong Spelling:  sli-p-y  Correct Spelling:  sli-pp-y 
Find more wrongly spelled words of Slippy to spell it well.