Scuming or Scumming: How To spell?
The word Scuming is misspelled against Scumming, a noun meaning "That which is scummed off; skimmings; scum; -- used chiefly in the plural."
Scumming has double "mm" is mispronounced as "m"Remember double 'MM' in between the strings scu & ing which should not be misspelled with single 'M'
Wrong Spelling:  scu-m-ing  Correct Spelling:  scu-mm-ing 
Check more misspelled words of Scumming to spell it correct.