ff 

FF means many things, some already said, I might (most likely will) repeat.
#1. Fist fucking- the act of stuffing a fist up a pussy *owch*
#2. Foot fucking- a type of masturbation that women do to their male partners dick.
#3. Final fantasy- a game played by geeks, such as my boyfriend, that I should probably learn to play.
#4. Fan Fiction- a type of writing that uses already made characters from books and movies and such that have sex, also called slash... gay LOTR ones at www.libraryofmoria.com.
#5. Father fucker- a person who likes to fuck their dad/friend's dad.
#6. Fucking freak- ... me...

I think I've made myself clear.

ff by MizMilenko May 27, 2004

FF 

An acronym for fruit fly AKA fag hag.

What would a gay man be with out his fabulous FF?

FF by LADYDTK October 27, 2010

FF 

Stocking fetishist abbreviation for old-fashioned stockings from the 40's and 50's that are knitted flat and sewn together leaving a distinctive back seam. Authentic full fashioned stockings also have a top welt made by doubling the fabric over and sewn with a small hole in the back seam called a "finishing hole".

Look, it matters to you if it matters.

"Hi, baby, are you wearing your FF stockings and your CFM pumps? I'll be right over for a little soft-core CBT..."

FF by Axel von Auersperg September 16, 2005

FF 

Friendly fuck

Bob: Totally fucked a chick last night

Rob: Man u in love?

Bob: No it was a FF.

FF by Lanban November 30, 2010

ff 

heres all the definitions for FF:

freindly fire
Fire fight
Flying fuck
Flaming Fist
Frostfire
fortissimo
focus fire
Front Wheel Drive
Forum faggot
Freedom Fries
finds funny
False Friend
Fake fuck
Foot Fucker
Fucking Fool
Fan Fiction
Final Fantasy
Front flip
fun fuck
Fucking freak
Father fucker
Fist fucking
Fat Fuck
Freshly fucked
Fatal Fury
Final Fight
Front Engine

Bob: FF!
Joe: False Friend?
bob: no
Joe: Fire fight?
bob: NO
joe: Forum faggot?
Bob: No, noob
Joe: Front flip?
Bob: wait it was the second one...

ff by Is this name used? August 7, 2006

ff 

ff is texting short term for "fucking funny." Much more hip than an lol!

That girl is so ff. She makes me laugh my ass off!

ff by notnicole November 27, 2011

ff 

Freshly fucked.

"What you been doin? You look all ff."

ff by Speed Racer June 5, 2004