Hey friend, are you sure about that words? Where did you get it? I think it's egyptian accent That means "for egypt" For: خاطر - khater Egypt: مصر (ماسر) - mesr P.s: i'm not sure if that what it means But if you could tell me where you found it i can help you طاب يومك

:D هذه إلاضافة عشان خاطرك، المصريين يقولون: مَصْر وليس مِصْر

Shukran!!!

It's a slang Egyptian term, ماسر written in that way to mock pronunciation of some Egyptians who mix س with ص. The complete correct term is عشان خاطر مصر which means: For the sake of Egypt.