Biff or BIFF may refer to:
People Biff (name), a given name or nickname Biff (cartoon), British cartoon strip
Computer-related terms biff (Unix), a UNIX mail notification program. BIFF, also B1FF or B1ff, a pseudonym used on Usenet and Internet BIFF, the Binary Interchange File Format, used by Microsoft Excel
Film festivals Bakersfield Independent Film Festival Bahamas International Film Festival Beijing International Film Festival Beloit International Film Festival Bergen International Film Festival Berkshire International Film Festival Berlin International Film Festival Bogota International Film Festival Boston International Film Festival Boulder International Film Festival Brisbane International Film Festival Brooklyn International Film Festival, former name of the Brooklyn Film Festival Brussels International Film Festival (disambiguation), various film festivals in Brussels Buffalo International Film Festival Busan International Film Festival, previously "Pusan International Film Festival"
Other uses The Bristol F.2 Fighter of World War I Bangsamoro Islamic Freedom Fighters an Islamic militant group based in the Southern Philippines WBFH, also known as The Biff, a community radio station in Bloomfield Hills, Michigan
See also Biff Burger, an American fast food franchise Elysian Fields, Texas, once known as Biff Springs BIF (disambiguation) BIFFF