The word Slaper is misspelled against Slapper, a noun meaning "Anything monstrous; a whopper."
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Slapper has double "pp" is mispronounced as "p"
Remember double 'PP' in between the strings sla & er which should not be misspelled with single 'P'
Wrong Spelling:  sla-p-er 
Correct Spelling:  sla-pp-er 
Explore spell check of Slapper to spell without errors.