F.O.S.

Abreviation for "Full of Shit"

You are so "F.O.S."
They are really so "F.O.S."

by Bev Lane May 29, 2006

F.O.S.

Code word for full of shit to get you out of trouble. You say it to someone and they just look confused when other people might realize what it means. Can also be pronounced Fos for short.

When my teacher told me that my homework assignment I turned in was worth a D when I knew it was worth and A, I said "You're F.O.S., this work is flawless!" I got sent to the office because apparently he knew what F.O.S. meant.

by PrincessR December 7, 2009

F.O.S

Full Of Shit: no data, no proof, a baseless opinion.

He's F.O.S. He doesn't know what he's talking about.

by gmerritt November 7, 2005

F.O.S.

Acronym for Fuck On Sight. A type of individual when seen by another, one would be willing to have sex with without knowing anything about them, not even their name.

"Dude, that girl in the parking lot, her eyes, those hips, she's a definite F.O.S."

by mayej May 10, 2009

F.O.S.

Flowers over snitchs, found in a lil wayne song

F.O.S. for life!
F.O.S. all day

by BALLIN!! December 12, 2007

F.O.S

term used for masturbation. Stands for "Fuck Ones Self"

Going to bed to FOS be back later

by toilet`duck January 1, 2005

M.o.b.; F.o.s.

Money over bitches, flowers over snitches.

It was made famous by rapper Lil Wayne in the song 'Big Dogg status'.

Mike:Fuck girls and rat bastards.
Dave:Hell yeah. M.o.b.; F.o.s.

by BoVice79 January 25, 2011