OK, I can't resist a few more..
PFC, Private First Class ...but reworded to.. Poor Fucking Civilian (anyone leaving the military)
POV, Privately Owned Vehicle (more commonly known as "cars")(also "Point Of View" outside of the military)
FTA, Fuck The Army (initials used as graffiti on military walls)
MAD, Mutually Assured Destruction (I think of this term every time an opponent frags me at the same time I frag them in an FPS, First Person Shooter game)
LAW, Light Anti-tank Weapon (Hey, Tank! I have the LAW on MY side!

)
NBC NCO, Nuclear, Biological & Chemical Non-Commissioned Officer (sergeant) (what I use to be)