Definition of "bumf"

And as for the limited warnings on documents and signs – we are so used to reading this bumf we fail to realise when they mean business.

2006: Quest, Richard, A Sour Taste in the Mouth, CNN.com, October 28, 2006

In America alone, people spent $170 billion on “direct marketing”—junk mail of both the physical and electronic varieties—last year. Yet of those who received unsolicited adverts through the post, only 3% bought anything as a result. If the bumf arrived electronically, the take-up rate was 0.1%. And for online adverts the “conversion” into sales was a minuscule 0.01%.

2013 May 25, “No hiding place”, in The Economist‎, volume 407, number 8837, page 74