FOS

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

FO

Abbreviation of Fuck off

Guy one: I don't like you
Guy two: FO

by 2451346523562 December 25, 2010

"fo"

An errant golf shot warning other golfers on the course of a ball coming their way.

by Archie Black July 11, 2003

fo

Expression of disgust often heard in Yucatan, Mexico.

Also spelled: Fó

Guy: Look at Pedro, he barfed all his cerveza.
Chick: Fo!

by MousePad July 25, 2008

FO

Finished object
Especially used in craft & knitting blogs and magazines to designate a completed item
Synonym UFO: Unfinished item

e.g. My latest FO turned out pretty well.

by Eden Dickens December 5, 2006

FOS

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 December 11, 2007

fos

Flies on shit.

I was all over her like fos.

by Jesuswtf January 31, 2004