[FFA] Free For All (especially in First Person Shooters)

[FFlO] "Far Flaming Out", old hippie term

[fickle finger of fate] See: [ACT OF GOD].

[fiddle] See: [PLAY SECOND FIDDLE].

[fiddle around] See: [FOOL AROUND] (3).

[fiddle with] {v. phr.} To carelessly play with something. * /If […]

[fiddler] See: [PAY THE PIPER] or [PAY THE FIDDLER].

[field] See: [CENTER FIELD], [LEFT FIELD], [OUT IN LEFT FIELD], [PLAY […]

[field goal] {n.} 1. A score in football made by kicking […]

[fifth] See: [TAKE THE FIFTH].