FYI - For Your Information 
FOAF - Friend of a Friend 
FTF - Face to Face 
FTW - For The Win 
FWIW - For What It's Worth 
FAWC - For Anyone Who Cares 
FBKS - Failure Between Keyboard and Se… 
FDGB - Fall Down Go Boom 
FE - Fatal Error 
FMTYEWTK - Far more than you ever want… 
FOC - free of charge 
FOFL - Falling On Floor Laughing 
FOMCL - Falling off my chair laughing 
Ford - Found On Road Dead 
FSBO - For Sale By Owner 
FTASB - Faster Than A Speeding Bullet 
FTL - for the loss 
FTR - For The Record 
FTTB - For The Time Being 
FYM - For Your Misinformation 
F2F - Face to Face 
fab - fabulous 
FACASAF - Feed a cold and starve a fev… 
FAI - frequently argued issue 
FAIK - For All I Know 
FAMCL - Falling of My Chair Laughing 
FAQ - Frequently Asked Questions 
FAS - for a second 
FATT - Funny At The Time 
fav - favorite