We all learn bro... up until the age of 8 (i think) I had no idea what was the function of the gear lever in my fathers car!
..so do not get upset and let me explain
The term is NCP or Non Custom Paid vehicle. Vehicles that cross the border and are used in pakistan without payment of taxes and duties fall in this category. They are mainly smuggled in from Afghanistan and abundantly available in areas close to the border. Some do make it to big cities like the BMW someone mentioned. The list of NCP vehicles is not limited to Cars but includes 4X4's (actually more) commercial vehicles and motorbikes..(big bikes)