Ydk

YDK means : “You don’t know”

“Wdym Ydk?”

YDK

You Don't Know!?

YDK means You Don't Know.

ydk

Ydk means “You Dont Know” Y = You D= Don’t K= Know.

“Wait ydk what chickens are”

ydk fi zby

a word used in Algeria and Morocco and also Tunisia, it can be used while doing something by force even if the other person objects, and can also be used to express its disappointement about something

Farouk : you ain't gonna make it man.
You : I'm gonna make it w ydk fi zby

2nd example
Anes : HAHAHA you got a big nose Ahmed
You : Ydk fi zby ! go fuck yourself