EFF may refer to:
- The Effective Federal funds rate
- Electronic Frontier Foundation, a U.S. non-profit advocacy group
- Elf Fantasy Fair, a fantasy event in the Netherlands
- Economic Freedom Fund, a U.S. political organization
- Equipped for the Future, a U.S. non-profit adult literacy project
- Election Fighting Fund, a UK fundraising organisation in the 1910s
- Ethiopian Football Federation, the governing body of football in Ethiopia
- Evergreen Freedom Foundation, a U.S think-tank
- European Fisheries Fund, a fund allocated by the European Union (see Structural Funds and Cohesion Funds)
- DC Environmental Film Festival, a festival held annually in Washington, DC
Eff may refer to:
- The English spelling of the letter F
- A euphemism for the word fuck
Famous quotes containing the word eff:
“What we know partakes in no small measure of the nature of what has so happily been called the unutterable or ineffable, so that any attempt to utter or eff it is doomed to fail, doomed, doomed to fail.”
—Samuel Beckett (1906–1989)