The word Sluging is misspelled against Slugging, which is present continuous of "Slug"
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Slugging has double "gg" is mispronounced as "g"
Remember double 'GG' in between the strings slu & ing which should not be misspelled with single 'G'
Wrong Spelling:  slu-g-ing 
Correct Spelling:  slu-gg-ing 
Check more misspelled words of Slugging to spell it correct.