F

F: Designation for US fighter aircraft like F14/F15/F16/F22
FAL: Fusil Automatique leger (7.62mm rifle made by Belgian company FN Herstal)
FAC: Forward Air Control(ler)
FACman: nickname for a FAC person
FACit: to hit with some form of airstrike (fixed wing or rotary)
FCS: Fire Control System; a complex of targeting, rangefinding, fire solution computation, and sensor equipment that enhances the fire accuracy, especially at long ranges.
FIB: Fallschirm Infanterie Batallion
FIK: Fallschirm Infanterie Kompanie
FIDO - Fuck It-Drive On
FIGMO - Fuck It, I Got My Orders - Vietnam 1968
FIIH - Fuck it, I'm Hungry
FISHDO - Fuck It, Shit Happens - Drive On
FIFI - Fuck It-Fly It
FLAK-FlaK: FlugAbwehrKanone or Antiaircraftgun
FOXTROTT : F in NATO alphabet
FLOT- Foward Line of Troops. Where the forward edge of friendly troops are deployed.
FRU: Fuselage Refuelling Unit
FUBAB - Fucked Up Beyond All Belief
FUBAR - Fucked Up Beyond All Repair/Recognition/Reason
FUBB - Fucked Up Beyond Belief
FUBISO - Fuck You Buddy, I'm Shipping Out
FUJIGMO - Fuck You Jack, I Got My Orders
FUMTU - Fucked Up More Than Usual
Funk(FU) German for radio
Funkgeraet - radioset
Funklenk FkL - radiocontrolled( vehicle)like Goliath.
FF: Frigate (from 1975)
FFG: Guided Missile Frigate (from 1975)
FFT: training Frigate (from 1990)

update: January 23 2011