U4AB Full Form. Full Meaning of U4AB Find long form and abbreviation, slang or definition of U4AB. What does U4AB mean? What does U4AB 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.