FAB
adj. B1 Intermediate US //ˈfæb// UK //fˈæb// fab
adj. Stands for fabulous. Extremely good or attractive. You use this when you are very impressed by something and want to sound enthusiastic.
adj. Abbreviation for fabulous. An informal clipping used to express high approval or delight. Often carries a nostalgic or lighthearted tone.
You look absolutely fab in that dress.
The band played all their old hits and the atmosphere was just fab.
While some critics found the retro aesthetic a bit much, most fans agreed the concert was a fab tribute to the sixties.
Usage
Often used as a predicative adjective after linking verbs like 'look' or 'be'.