you dont know jack shit 

you dont know jack shit a word meaning you know nothing or are too stupid to figure it out

dude whats an electric car

man you dont know jack shit you are too stupid to know what an electric car is unless you get ran over by one

you dont know jack shit by littlejimmie January 24, 2019

I know you ain't talking 

When someone is trying to roast you but he did something lamer than you.

-DAMN, your haircut is so ugly!
-BITCH! I know you ain't talking with that shitty ass fade.

I know you ain't talking by magicthanos March 22, 2021

you're so sussy i know you took my fortnite card 

I know you took my $19 fortnite card, GIVE ME MY $19 FORTNITE CARD, You better give me my $19 fortnite card, I need $19 FORTNITE CARD NOOOW!

Guy 1: you're so sussy i know you took my fortnite card
Guy 2: I didn't take it
Guy 1: That's a bit SUS

you're so sussy i know you took my fortnite card by ‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎ June 3, 2021

The name you should know 

Kirby

Kirby Kirby Kirby, that's The name you should know.

The name you should know by IRealyHateWindowsNews December 20, 2021

You Do Know

(Alternate: You Do Realize)

An online phrase that roughly means "I'm a condescending prick."

Used on message boards by self-important dipshits to preface an argument that berates the intelligence of their opponent.

Any sentence that begins with "You do know" or "You do realize" is implied to end with an implicit "...you fucking idiot."

"You do know that Democrats are all just fascist tax-collectors fighting a war on faith, right?"

"You do realize that Republicans are money-grubbing, Bible thumping rednecks and soccer moms, right?"

You Do Know by Mark Werguild May 5, 2012

I know you are, but what am I? 

It's quite simply the most retarded comeback someone makes when they've completely lost the argument. This statement signifies that the argument has gone to a completely immature level. Below is a hardcore argument starting with the immature statement :)

Person 1: I know you are, but what am I?

Person 2: Good question. What are you?

Person 1: Wow, you're so dumb, you don't even know what I am?

Person 2: You're so dumb, you can't even answer my question.

Person 1: I don't answer stupid questions. Sorry.

Person 2: Then you shouldn't have made your first one.

I know you are, but what am I? by Searingwolfe July 13, 2011

But you never know 

A phrase used to add to the end of a conversation, when you have just realized you crushed the person's hopes and dreams.

Kid 1: Man I wish I could get back with my ex you know...

Kid 2: Well she's back with her ex-boyfriend, and hates your guts.

Kid 1: ...

Kid 2: But you never know...

Kid 1: I know huh.

But you never know by Daddy-Diaz May 22, 2010