Bumf is all that pointless paperwork, waffle, or “for your information” clutter that lands in your inbox and makes you want to lie down. It usually means the important bit exists, but it’s buried under a mountain of attachments, forms, and corporate guff. Proper classic for office life and government letters.
"She pinged me forty pages of bumf before the meeting, proper nightmare. I’m there with a brew, skimming like mad, and the only useful bit’s hiding on page thirty-seven."