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Shlub (noun) alternative spelling of schlub 
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Schlub (noun) A person who is clumsy, oafish, or socially awkward, or unattractive or unkempt. 
Wiktionary
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Schlub (noun) a talentless, unattractive, or boorish person “the poor dumb shlub just didn’t get it” 
Oxford Dictionary
