(Flaw Nigga Shit) the state or being of a flaw stereotypical African american
1."Wasn't you suppose to go pick up your girl an hour ago?"
Naw she can walk.
"Dangggg, thats that FNS."

2."A man, why you ran when I got jumped?"
You got jumped?
"Fuck you man! You on that FNS!"
by IcyM14 June 01, 2011
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Fake Nigga Shit.

Used when someone's actions denote lameness, or a lack of agreement with a code of morality (bro code, etc.)
Person 1: "Yo, fuck your hometown! That shit is lame."

Person 2: "Damn son, why you gotta hurt my feelings like that. That's on some FNS."
by McBoner July 02, 2012
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FNS stands for Flared Nostril Syndrome. It occurs when someone has abnormally large and/or flared nostrils all the time. A perfect example of this syndrome is on Mark Texiera of the Yankees, he has a bad case of it.
Hey man, what's wrong with that guy's nose?

Nothing, he just has a bad case of FNS.
by Miker94 October 26, 2009
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An abbreviation for Fat Newfie Shit, often used to describe loud,large newfies that grew up in Port Hardy British Columbia and have no accent. They aslo seem to have a large amount of game that no one can explain and are often recognized as slimeballs.
Jon is a FNS.

You arent a real newfie your a FNS.
by Port Hardy PIMP April 17, 2006
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Generally, to screw someone or something over, or otherwise mess things up (such as plans or a game). Can be used interchangeably with Bullshit.
Darren: Hey man, I'm on our way
Madonna: Oh, well I'm about to leave
Darren: What? You said you were gonna be there for awhile
Madonna: Yeah but I got bored
Darren: This is some FNS, man
by fadu09 April 01, 2010
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