Jon: Ya dude, I wanna go, but I'm having trouble with the missus.
Steve: YDEK!
Acronym for "You don't even know."
That girl at Wal-Mart was so hot man..ydek....YDEK!
Ydek fih, coming from Moroccan Darija; means "your hands on the dick".
it's 's used to tell someone "you fucked up!"
person 1: my exams start next month... I'm lucky
person 2: I'm jealous...mines are next week
person 1: Ydek fih