FS

Flight Simulator. Means the same as MSFS, so Microsoft Flight Simulator
FS9 or MSFS9 means Flight Simulator 9
FSX is Flight Simulator X
FS2002 is Flight Simulator 2002
etc.

1.
A: Hey, what flight simulators you use when you're flying?
B: FS9, X-Plane, Enemy Engaged, LOMAC. And you?

2. Hey, people, someone wants to fly in FS9 through multiplayer today?

by Azazil_6 April 25, 2011

fs

An abbreviation for Formspring.me , a website where you can ask questions to anyone who has an account, either anonymously or publicly.

Dude check out my formspring (fs) , some chick thinks I'm hot but she's anonymous!

by mdl3clw December 1, 2010

fs

Short for "Fat Slut" - girls who are obese and still wear tight, revealing clothes in attempts to get sweet hooks.

From the same semantic field as "ys" (young slut).

"Far out why are all parties nowadays filled with fs."

by Drylinerrr October 30, 2011

FS

Fuck sluts. That is all

IM gonna go out tonight to fuck sluts, FS

by Wfywdun May 12, 2017

fs

n. short for fat shit

1. You're a fs.

2. Your mom's a fs.

by Batost March 12, 2008

fs

the signature that the unabomber used to sign his letters to victims, and on his manifesto.

Dear Scientist, Your investigation into technology will kill us. FS

by wtcards January 11, 2010

fs

internet abbreviation for fo shizzle

<Jameel> That Keely Hazell is really hot.
<Dan> FS!

by Big*D December 30, 2008