SLEP Full Form. Full Meaning of SLEP Find long form and abbreviation, slang or definition of SLEP. What does SLEP mean? What does SLEP stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.