SFF
An acronym for "So Fuckin Funny". To replace the much lamer LOL for "Laugh Out Loud". Implies utmost hilarity. Generally used in text or instant messaging; can be used as an adjective or on it's own.
That comedian last night was SFF!

His yo momma joke was classic. I couldn't stop laughing. SFF!

by the illitator May 19, 2006

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Top Definition
sff
Same Fanbase Factor
This relates to the GameFAQs polls where two characters have the same fanbase, such as Zelda/Mario.
HOLY CRAP, Metroid got beat by SFF!
by The Cryptic July 26, 2006

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Sff
So Fucking funny
Omg Your SFF
by ilollolol June 06, 2009

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sff
Science Fiction and Fantasy
sff are the Sci-fi and fantasy genres of movies, games, books, comics, etc.
by gearguts March 07, 2015

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Acronym for Stoner forever forever stoned
Chatter1: So do you smoke weed?
Chatter2: SFFS
by Herbal Santa March 04, 2008

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sff
Short hand term used when texting which means Spontaneously Fucking Funny! This term is to be used only when something is quick, witty, and off the cuff. This term is not to be overused! sff puts an lol to shame!
U R sff! It turns me on!:-)
by notnicole November 27, 2011

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sff
''so fxcking funny''
-hey how was the Hangover?

-SFF!

-would you go out with me?
- HAH, that was sff.
by yerAjerk July 30, 2009

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Sff
So Freaking Funny (usually sarcastic)
"Your face looks like a rat, because you have huge teeth!," Josh said.

"Wow. Sff," Jeremy replied.
by Mialynn13 March 28, 2015

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