koz omak

It means your mothers pu**y.

Note: these names are neither my friends nor my parents, these are just imaginary people.
Example 1:
Malik: lmao i beated you in this game in 4 seconds, cry about it
Mahmoud: BRO STFU KOZ OMAK IBN HAIWAN O KALB YA GH7BA YA SHARMOOT IBN ZIFT
Malik: bro chill

Example 2:
Simon Coward: What is this?
Malik: its your f*****g koz omak

Example 3:

Your bro: yo bro i just got 10 thousand dollars lol
Malik: give me now
Your bro: no lol
Malik: Koz Omak you stupid ibn Kalb, I'm taking your money
Your bro: NOOOOOOOO!!!