JAB Full Form. Full Meaning of JAB Find long form and abbreviation, slang or definition of JAB. What does JAB mean? What does JAB 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.