DUFF

Duff is a word with several distinct meanings in English. It can refer to a natural layer of organic matter on the forest floor, a traditional British steamed pudding, a surname or given name, and occasional acronym usages in popular culture.

In ecology and forestry, the duff layer consists of partially decomposed plant material such as leaves, needles, and twigs that accumulates on the soil surface. It lies above the mineral soil and below fresh litter, and plays a role in moisture retention, nutrient cycling, seed germination, and soil temperature regulation. The composition and thickness of duff vary by climate, vegetation, and disturbance.

In British and some Commonwealth cuisines, "duff" refers to a steamed suet pudding, often with dried fruit. It has been part of traditional menus since at least the 18th or 19th century, with regional varieties such as plum duff or figgy duff (a Newfoundland dish). It is typically served with sauce or custard.

Duff is also a surname and given name of English and Scottish origin. Notable people include actress and singer Hilary Duff. The term appears in popular culture in various forms, including the film The DUFF, a 2015 teen comedy, where DUFF stands for Designated Ugly Fat Friend, as well as in other media and phrases using the word.