Oh you know what 

A colloquial phrase predominantly used by the millennial and hipster crowd, referring to an underlying, shared, or assumed understanding between the speaker and the listener. It's used to announce that the speaker had a realization on a previous subject.

Tristan: "oh you know what"
Tristan: "I think I know why"
Tristan: "yup we're good"

Oh you know what by Amesbury Company July 24, 2023

Oh so you dont know what karlson is? 

KARLSON IS JUST A LITTLE GAME IM WORKING OM WISHLIST IT NOW ON STEAM GAMERS

Dani: Oh so you dont know what karlson is? KARLSON IS JUST A LITTLE GAME IM WORKING OM WISHLIST IT NOW ON STEAM BONERS

Oh so you dont know what karlson is? by EPICKARLSONGAMER June 18, 2021

Oh you don't know what karlson is? 

Something louder than anything and whishlist karlson so it will be release

Dani:Oh you don't know what karlson is?
ITS JUST A LITTLE GAME I'M WORKING OH ABADA AGAFAHA

Oh you don't know what karlson is? by Mamanams August 7, 2021

Oh you don't know what Karlson is? 

Karlson is just a little game Dani's working on, Its currently the 12th most wishlisted game on steam so smash wishlist now so we can get to the number one spot GAMERS!!

Guy 1: "Bro have you heard of karlson?"
Guy 2: "Yeah have you?"
Guy 1: "Nah man, I've never seen this"
Guy 2: "Oh you don't know what Karlson is? Karlson is just a li-"

Oh you don't know what Karlson is? by Qutex December 13, 2021

Oh you don't know what karlson is? 

Something louder than anything and whishlist karlson so it will be release

Dani:Oh you don't know what karlson is?
Its was at this moment that he knew.
He fucked up

Oh you don't know what karlson is? by Mamanams August 7, 2021