Green’s Dictionary of Slang

(Aus./US) time-wasting, stylistic excess.

1904		Sydney Sportsman (Surry Hills, NSW) 8 June 1/2: All the flummery and verbosity of the original manuscript [...] drivelling idiocy in dressed in its own old frills and flubby-dubs and fur belows,.
1920		A. Baer Bryan’s Stand 27 June [synd. col.] Underneath all the bunk and flub-dub a blind man can see there is a determined effort [etc].