F4K Full Form. Full Meaning of F4K Find long form and abbreviation, slang or definition of F4K. What does F4K mean? What does F4K 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.