Before plunging the knife into Fara Sherazi in Homeland S04E10, Haissam says something in Arabic/Urdu that sounds like "cum kere fish". What does he say and what does it mean?
I remember looking it up after watching this and apparently (unless I've been misled) he said 'Tum kafir', which is bad Urdu\Kurdish for 'You infidel' (though in this context, it's more like a profane 'blood traitor'). Here's some info about this term.
EDIT: Just re-listened to this and it does sound like 'Kum kafish'. However, the actor is Turkish and Kafir is pronounced (or sounds to Westerners, anyway) like Kafish of Kafirsh in Turkish.