adjective very good, excellent; used for registering general approval or agreement. A shortening of FABULOUS (very good, etc.); hugely popular usage in the 1960s, in part thanks to The Beatles. Subsequently in and out of vogue, surviving between times as irony. The cult science fiction television programme Thunderbirds (1964–66) used 'F. A. B.' as an acknowledgement but otherwise meaningless catchphrase; the 1999 UK re-run coincided with a vogue revival US, 1957