FF 

Furiously fapping. To be used when you say something so amazingly great, that isn't usually of a sexual nature, it deserves a hard wanking session.

Just heard Jay-Z and Kanye West's new album, FF.

FF by turdface42 August 8, 2011

Ff 

Ff is a shorter way of saying fortnite faggot it’s used when someone plays fortnite to much . Or your gay with fortnite.

My bf is such a Ff I swear he don’t even notice me .

Ff by Soggywafleeee February 11, 2019

ff 

Usually used to describe faggots or fat people who are considered faggots.

David Lu is a ff.

ff by FFFATHER March 5, 2017

ff 

Fun Fact, something that is assumed to not be know by the recipient

Just alittle ff for ya.

ff by Word Coolio April 12, 2007

FF 

Inserting of one's fist into another persons bum hole.
Often gay men. Often use drugs to get to that level.

FF - Bb - Sub boi

Translates
Put your fist in me, your penis included, I will basically do what I'm told as my parents were mean to me and I need discipline

FF by Lukatar October 1, 2018

FF 

Fucking fierce.

That woman is FF.

FF by laumarshmallow December 19, 2008

FF 

favorite friend

I went shopping with FF today

FF by pattyshychen April 8, 2012