FSS 

Flinders Street Station (in Melbourne, Australia)

The three letter code for Flinders Street Station is FSS.

FSS by MelbourneTrainEnthusiast June 16, 2023

FSS 

For shit's sake. Just for the hell of it. Just because.

Yo, I gave that bitch extra money FSS.

FSS by QuackyDuk April 21, 2017

fss 

IM acronym for Fucking Super Sweet

Steve: I got the job!
Smith: FSS!

fss by squashy the Evil Super-Villain April 5, 2003

FSS 

Fosho Shawty

You: Yo we goin to da movies tonite?

Friend: fss

FSS by TyAM January 9, 2010

FSS 

Fat smelly shit

Dude 1: yo! did you just do a FSS?
Dude 2: Nah mate
Dude 1: I can see it poking out the bowl, you dirty wanker!

Can also be used as an insult

Dude 1: Leave me alone, you FSS!
Dude 2: calm down man, i was just joking.

FSS by Fatcunt322 May 20, 2019

FSS 

Fap, shower, sleep

man1: SFS!
man2: isnt FSS better?

FSS by SlothHead January 17, 2018

Fss 

For shit sho’

Im coming tonight fss !

Fss by Savage baby September 26, 2023