FFS is a commonly used initialism for "for fuck's sake". It is often said or typed as a form of minced oath by abbreviation. "FFS" may also refer to:
Computing Feige–Fiat–Shamir identification scheme, in cryptography Find first set, a type of bit operation FreeFileSync, a software package
File systems Flash file system Formatted File System Amiga Fast File System Unix File System often called Fast File System
Music FFS (band), a rock supergroup of Franz Ferdinand and Sparks FFS (album), their debut album
Organizations Political organizations For our Future’s Sake, a UK campaign group calling for a public vote (People's Vote) on the final Brexit deal Social Forces Front (French: ), a political party in Burkina Faso Socialist Forces Front (French: ), a political party in Algeria
Other organizations Frankford Friends School, in Philadelphia, Pennsylvania, United States French Federation of Speleology Swiss Federal Railways (Italian: )
Places FFS Arena, in Lund, Sweden Frankfurt South station, in Germany French Frigate Shoals, an island in the Northwestern Hawaiian Islands
Science and technology Facial feminization surgery Free-fall sensor Fringe field switching Full flight simulator
Other uses Farmer Field School, a community development process Fee-for-service, a payment model For Film's Sake, Australian women's film festival Fully fashioned stockings, stockings with reinforce toe and tops