Kos Maghs

An Iranian term used to describe a very stupid, dumb, or low intelligent individual in a very disrespectful manner. With Kos meaning the genitalia of a woman, and maghs meaning brain. So basically "cunt brained". It is 99% of times used by men.

Omid : Ahmed said You's a bitch !
Mohammed : He's a kos maghs.

Jaan

An Iranian word usually attached to the end of a name which means "Dear".
It could also be used as a response to someone calling you.

Example 1 :
Mahmud (in a letter) : Omid jaan...
Example 2 :
Father (from down stairs) : Son !
Son : Jaan ?