Duff may refer to: People Duff (surname) Duff (given name) Duff (nickname) Karen Duffy, an actress, model, and former MTV VJ once known as "Duff" Duff Roman, on-air name of Canadian radio personality and executive David Mostoway (born 1938) Places Duff, Indiana, United States, an unincorporated community Duff, Nebraska, United States, an unincorporated community Duff, Tennessee, United States, an unincorporated community Duff, Saskatchewan, Canada, a village Duff Hill, a mountain in County Wicklow, Ireland Duff River, a river in County Sligo, Ireland Duff Islands, in the Solomon Islands, Pacific Ocean Mount Duff, Mangareva Island, French Polynesia Mount Duff (Yakutat), a Canadian mountain on the border between Alberta and British Columbia Duff Peak, Victoria Land, Antarctica Duff Point, Greenwich Island, Antarctica Arts and entertainment The DUFF (novel), by Kody Keplinger The DUFF, a 2015 film based on the Keplinger novel Duff Beer, a fictional brand of beer on The Simpsons Elmyra Duff, a fictional character on Tiny Toon Other uses Duff (dessert), a Bahamian dessert and an English term for pudding Duff, another name for plant litter, plant material that has fallen to the ground Duff, slang term for buttocks Duff baronets, three titles in the Baronetage of the United Kingdom , two British Royal Navy frigates Duff (1794 ship), a British merchant ship Duff House, Banff, Scotland Duff Building, Owosso, Michigan, United States, on the National Register of Historic Places Down Under Fan Fund Daf, also called duff, an Indian frame drum of Persian origin "up the duff", British and Australian English slang for being pregnant. Duff reaction, a formylation reaction used in organic chemistry See also Duff's (disambiguation) DUF (disambiguation)