Well, ive only heard egyptians say it (or people putting on an egyptian accent).

It can get confusing.... some phrases look completley different.. for example:

Standard arabic...........Egyptian....................English
MADHA HADHA ?.........EEH DAH ?.............WHATS THIS?
MADHA TAAMAL?.........INT AAMIL EEH?.....WHAT ARE YOU DOING?
ATRUKUH...................SEEBUH..................LEAVE HIM (alone)

Im certainly not an expert and im just sharing the difficulties i had. Im sure someone will set me straight :)

Respect

GIASI