fo-fo's are the rims of your car...this originated in the south...when swangin you must have a nice car with nice fo-fo's.
look at dat car ova there tippin on fo-fo's
by ~*Nix*~ June 13, 2006
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JP: FO!
Me: Did you just tell him to FO?
JP: No I said "oh"
Me: I totally heard "FO" as in "fuck off", sorta like "FU" for "fuck you"
JP: Hahaha
Me: Yeah I couldn't believe you said that at work
Me: This belongs on Urban Dictionary
by randomness323423 January 30, 2011
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Abbreviation: FOS = Full of Shit

• It can mean that someone is lying, therefore full of shit.

• It can also mean the literal aspect, the state of being FOS.
(constipated) or (bowel obstruction)
That patient is totally FOS, just trying to get some drugs.

The patient in room 22 is literally FOS; constipated as hell.

They tried to tell me a BS story about losing their prescription, but I can tell they are FOS.
by Night.ER.Ninja July 27, 2014
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Typographical error of "go," it has now achieved near-meme status for certain internet users.

It originated on www.ar15.com on June 2, 2008. Popular and regular member "shaunofthedead" purported to have the opportunity of an orgy with some unknown people. After drunkenly deliberating for several hours whether or not he should take advantage of this opportunity, at 10:42:57 EST he posted simply "fuck it im foing."

He was never heard from again.
"fuck it im foing"

"Is anyone going to fo to the tea party?"

"Green means "fo."
by PhuzzyGnu September 20, 2009
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fo is 4oz of prometh\codiene mix with some sprite and ajolly rancher and yall be leanin thas purple drank baby
i just poured up myself a fo bout to get folded
by springnigga August 22, 2007
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reffering to the number "four".
reffering to the word "for".
"Im fo dollas short on my bill dawg"
"Fo sho my niggas"
"Im all fo you baby"
"One, Two, Three, Fo"
"Fo real"
by ShOvel July 25, 2003
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