duff

1. (Scotland, Northwestern US, British Columbia) Decaying vegetable matter on the forest floor.Examples: "Forest fires have often been started from wantonness; for the sake of making a big blaze, fires will be carelessly left by guides, or will be smouldering in the duff,* where it will burn for weeks. I have seen the smoke from fires in the duff even after the snow has fallen. * Local term for the vegetable growth covering the forest ground of the Adirondacks. under the spruce trees, the falling needles accumulate to considerable depth, forming the "spruce duff," a peculiar and interesting variety of forest humus."; "These methods also make it possible for the forest officer to describe and to record his observations in precise terms such as “6% percent duff moisture” rather than in generalities such as “pretty dry duff.”"; "Depth of litter and duff under the crown of each tree was measured at a point that appeared to represent average depth. Bulk samples of litter (including duff) were taken under four pinyons and three junipers, and ovendried."British-ColumbiaNorthwesternScotlandUScountableuncountable

2. (British) A mixture of coal and rock.Britishcountableuncountable

3. (slang) The bits left in the bottom of the bag after the booty has been consumed, like crumbs.countableslanguncountable

4. (baseball, slang) An error.countableslanguncountable

1. (UK) Worthless; not working properly, defective.Examples: "Why do I always get a shopping trolley with duff wheels?"; "From its surface, he insisted, plain food became ambrosia, water nectar, and the duffest dope would blow your mind."; "The band developed its sound, shamblingly at first, on the road, in an era before thousands of blog or YouTube users could form an opinion of a band based on some MySpace demos and a duff early gig in Tacoma."Synonyms: bumUK

1. (US, slang) The buttocks.USslang

1. (slang, obsolete) To disguise something to make it look new.obsoleteslang

2. (slang, obsolete) To sell spurious goods, often under pretence of their being stolen or smuggled.Examples: "A person once taken-in by smuggled handkerchiefs, or anything, won’t deal with a hawker again, even though there’s no deception. But ‘duffing,’ and all that is going down fast, and I wish it was gone altogether."obsoleteslang

3. (Australia) To alter the branding of stolen cattle; to steal cattle.Australia

4. (US, golf) To hit the ground behind the ball.US

1. (slang, derogatory) Acronym of dumb/designated ugly fat friend, an attractive woman's less attractive friend.abbreviationacronymalt-ofderogatoryslang