An Internet shortening of "for sure for sure" spoken "fa sho fa sho"
Daquan texted me if he could borrow my #3 H pencil lead to which I replied, "fsfs"
by Skankin_Pickle May 1, 2015
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Abbreviation for "for straight for shizzie" AKA "for straight for shizzle."

This is commonly used as a fancy way to say 'hell yea' or 'no doubt.' Basically, acknowledging a comment while also adding a sense of excitement or anticipation.

kid1--> what we doin' tonight?
kid2--> We gonna go to the party tonight, get crunk, and nail us some hotties.
kid1--> fsfs

by gjbell1 September 11, 2007
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Abbreviation for Full Send Friday, defined as a term used by teenage boys to ask girls to hang out. When receiving a text saying "fsf?", you know you've found a full send type of group who WILL NOT let you down! Make sure you do not interpret it as "Female Seeking Female" as this is a common mistake made by young ladies. PS this term does not only apply to Fridays.
Harrison: "Hey girls, when's the fsf?"
Ladies: "Tonight dude! Get the ronas ready!"
by boyswilldoit February 13, 2019
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The Free Software Foundation (FSF), established in 1985, is dedicated to promoting computer users' rights to use, study, copy, modify, and redistribute computer programs. The FSF promotes the development and use of free software, particularly the GNU operating system, used widely in its GNU/Linux variant.
by strate March 14, 2007
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Adrian: can i touch your dick?
Ryan: fsfs nigga!
by Boardman24152425 February 28, 2018
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"Fuck Shit Fuck!" IMspeak acronym expressing intense rage or frustration.
<b>jescahhh</b> has left the room

HereizKegg: FSF!!!! Not again.
schlikywiky6669: jessica needs a new fucking computer.
by 2sick January 4, 2005
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