"Not Now John" is a song by the progressive rock band Pink Floyd, written by Roger Waters.

Unlike the majority of other tracks on The Final Cut (1983), "Not Now John" takes an upbeat, driving, tempo – and hard rock style – for much of its duration.

The words "fuck all that" were overdubbed as "stuff all that" by Gilmour, Waters, and the female backing singers, while the "Where's the bar?"

In a review for The Final Cut (1983) on release, Kurt Loder of Rolling Stone described "Not Now John" as "one of the most ferocious performances Pink Floyd has ever put on record.

"[7] In a retrospective review of The Final Cut (1983), Rachel Mann of The Quietus described "Not Now John" as "fun, but musically crass and obvious," further saying "this is Surrey Blues rock as vapid as the views it seeks to satirize.