noun

• (Britain) Federation of British Industry (1916–1965), forerunner of CBI (Confederation of British Industry).
• (Australia, weather, firefighting) fire behaviour index
• Fixed-bit index.
• (US, humorous) Female body inspector.
• (US) Initialism of Federal Bureau of Investigation. [The domestic intelligence and security service of the United States, which simultaneously serves as its primary federal law enforcement organization.]