From Longman Dictionary of Contemporary Englishfabfab /fæb/ adjective British English informal GOOD/EXCELLENTextremely good a fab new car
Examples from the Corpus
fab• It's fab but it's fairytales.• But what a fab flagship for variety.FabFab trademark a type of detergent for washing clothes, sold in the USFrom Longman Business Dictionaryfabfab /fæb/ noun [countable]MANUFACTURING a factory where silicon chips are madeOrigin fab (1900-2000) → FABULOUS 