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No Fucking Bueno; When something is REALLY bad and needs to be corrected now.
Nurse, "The doctor said that dog's platelet count is NFB and it needs blood now!"
by DannyAnnieBeauFanny January 30, 2009
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Nunya Fuckin Business - when somebody asks you something that is none of their business. This is a polite way of saying that it's none of their fucking business.
Friend - "I tried calling you last night where were you?"
Me - "NFB!"
by JodyMT September 11, 2014
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'Now Follow Back' ... Can also be 'Now Following Back." Usually used on Twitter.
@guy1: nfb

@guy2: I'm already following you.

@guy1: I know, I meant 'Now Following Back'

@guy2: oh, my bad.
by Ilikefries July 07, 2013
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Nerdy Fuck Boi. - typically a whiny ass skinny ass piece of shit who grew up a nerd got a little jacked started having some aesthetics and now thinks he knows and owns everything.

Likes: overcompensating, projecting his insecurities on his partners, making other people responsible for his happiness

Dislikes: people with real confidence, feedback of any kind, being told no
- Back in high school, Jeffrey was a nerd. To compensate he started watching some broscience and lifted, and traveled to Paris or some other European artsy city. Now he think he's cultured and his opinions are the end all be all.

He a NFB.

- David didn't get chicks in highschool because he was weird and insecure. Now that society is more accepting and he's a little more cute, he thinks it's cool to treat girls like garbage and passes it off as modern romance. Yet he's a "feminist" and ally.

He a NFB.
by Checkb4Urek June 04, 2018
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No fense, but...

Most used when you want to make any remark to the man you speak with, thus trying not to offend him.
- Hello man! I just drank 6 bottles of beer. Was coool!
- Nfb, It's gonna be bad for you organism.
by moutyjack April 27, 2010
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Kristen has a giant trash bag filled with puke in her car...She's an NFB... nasty fuckin' Bitch
by Beerman922 August 18, 2009
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None of your fucking business. It comes from the Bayonnese language of Bayonne, NJ. Made popular by the same guys who said "it just doesn't have the sizzle, sizzle."
Guy 1: "Hey Sally, how many peanut butter bagels is that for you today?"
Sal: "You know how many it is... it's NFB you stupid fucking asshole."
by thedeuceisloose July 06, 2012
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