The opposite of a know-all; a person who behaves as if they know nothing but really is incredibly knowledgeable, to the point of causing annoyance.
"You aced the test yet talk to me as though you failed, such a patronising little know-fuck-all."
by shitstained mattress September 16, 2020
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A Better Way Of Telling Some One To Shut The Fuck Up.

Also, What Most People Know Anyways.
Person A: Hey You Wanna Know Something?
Person B: You Know What?
Person A: What?
Person B: You Know Tow Things.
Person A: What Are They?
Person B: Fuck All And Nothing.
by Jane-Lane July 4, 2008
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Something a pimp will say to his hoes when they are acting "uppity" or bad.
Also a fun thing to say.
Fuck all u bitches!I'm giving you groceries and half of the income. What mo' do you want from me?
by Weak Ass Bitches December 2, 2004
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a more appropriate way of saying "fuck all them haters" when people are just major fuckwits and hating on you because you better than them
you: "fuck all dem haterz"
gabbie: "them* haters*"

gabbie is clearly a hater and is in serious need of braces
by gabbiesabitch March 14, 2011
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1. a sarcastic reply to someone who is not satisfied with what they have or
2. a claim to have eaten less than someone else
3. a moan that there was no food ready to eat at home
man 1 'I've only got one slice of bread here mate'
man 2 'you'll get two slices of fuck all in a minute mate if you don't stop moaning'

man 3 'I only had a pot noodle for my dinner'
man 4 'so what, I've had two slices of fuck all for mine'

man 5 'what did you get for your dinner when you got home mate?'
man 6 'same as usual, two slices of fuck all'
by Mr Cunninglinguist May 14, 2010
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