it could mean also :

Free Open Source


Free Open Source Directory
by peter edin August 27, 2008
Father over shoulder.
Stop the cybering! FOS!
by AriBigFatBlackGuy November 30, 2009
this is a shorter term for "Flap Of Skin". a flap of skin is someone in your group of friends whom you may consider the "loser" or the person who you only hang around with for a certain reason, that reason not perticulary meaning you enjoy their company.

it could also mean someone with NO private parts.
" Kris has no vagina"

"She is but a Flap Of Skin!"

"I couldn't concentrate when the FOS was talking to me, she annoys me to much."
by i heart flap of skin July 12, 2009
Pronounced 'Fahhz'
Stands for "Freak Out Syndrome"
(fos, fosing, fossed, foser)

1) noun: The instance in which someone has a crush on someone else but denies it, convincing themself that they don't actually like them.

2) verb (to fos, fos out): Any act of running away from a potential relationship or fling with another, for no apparent reason.

3) verb (to fos): When someone makes a move on you and you completely freeze up and aren't sure why. Side effects may include the feeling of flushed skin, increased heart-rate and utter nervousness.

4) noun: Something that ruins love lives.

Alternative spelling: 'foz'

"He grabbed her chin romantically and tried to kiss her, but she fosed majorly and couldn't move."

"He was the perfect guy, but she didn't date him because she had a bad case of

"Don't be a foser! This is a good opportunity!"
by Bestiesinastar March 23, 2009
1. Full Of Shit

2. Female Oral Stimulation

3. Nickname for Andrew Lynn
1. Furby is FOS

2. Morris: I went for a bit of FOS with apiphonyiernfi

3. Are you going to millys FOS?
by jOeFiSh15 October 08, 2008
n. to describe a person who is 'Full Of Shit', and treats those who try to help them with disrespect.
Person 1: 'I'm not coming to my doctor's appointment today because you didn't tell me I had to pay anything.'
Person 2: 'Don't be such a FOS.'
by Maria Espia March 17, 2008
Full Of Shit (FOS). A person who likes to talk too much about themselves.
I can't stand my boss he is FOS.
by MoFo medic November 14, 2007
Flies on shit.
I was all over her like fos.
by Jesuswtf January 31, 2004

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.