Stiff may refer to or describe:
Science and technology
Stiffness, a material's resistance to bending Joint stiffness, pain and/or reduced range of motion of body parts in humans and animals Stiff diagram, in hydrogeology and geochemistry, a way of displaying water chemistry data Stiff equation, in computational differential calculus Stiff fluid or stiff matter, modeled by the Zeldovich equation of state Stiff nut, a type of fastener
People Stiff Johnson, a producer of G. Love and Special Sauce (album), Libido (Buck-O-Nine album), "Demagogue" (song), and Yeah, It's That Easy Stiff Leadbetter ( – 1766), British architect and builder Carol Stiff, American women's basketball executive David Stiff (born 1984), English cricketer David Stiff (basketball) (born 1972), Australian basketball player Denise Stiff, American manager of contemporary musicians George Stiff (1807–1873), English engraver and newspaper proprietor Harry Stiff (1881–1939), English tug of war competitor and landowner Hugh Stiff (1916–1995), Canadian Anglican bishop James Stiff (1808–1897), English potter Jimmy Stiff (1911–1937), Australian athlete Jimmy Stiff, former member of American rock band Jackyl Lee Stiff (1949–2021), American mathematics education researcher Linda E. Stiff, 2007–2008 acting United States Commissioner of Internal Revenue Matthew Stiff (born 1979), English singer and radio presenter Patrick J. Stiff (born 1950), American bone marrow transplant doctor Peter Stiff (1933–2016), London-born South African author Robert Stiff (born 1960), Southern-Rhodesia-born British entrepreneur
Arts and media
Music Stiff (album), a 2016 album by White Denim Stiff Records, a British record label
Literature, film, and television Stiff: The Curious Lives of Human Cadavers, a 2003 nonfiction book by Mary Roach Stiff (novel), a 1994 novel by Shane Maloney in The Murray Whelan Series Stiff, a 2004 Australian television movie adaptation of it Seattle's True Independent Film Festival, an annual event 2005–2019 "Stiff" (Gimme Gimme Gimme), a 2000 television episode
Other uses Stiff, slang for a human corpse Stiff (professional wrestling), how a wrestler attacks an opponent Bindlestiff, hobo who carries a bindle Stiff Street, a hamlet in Kent, England