The literal translation would be لا تحشر أنفك في شؤون الآخرين "Don't stick your nose into other people's business" or "لا تحشر أنفك في مكان لا تنتمي له" Don't stick your nose where it doesn't belong!', but we never really say that in MSA, it would sound weird and not Arabic even though in English it makes perfect sense. The equivalent of this expression in Arabic (MSA) would be "لا تتدخل في شؤون الآخرين" " and "لا تتدخل فيما لا يعنيك". However, in Arabic dialects we use this expression just as you do in English; in the Egyptian dialect for example we say "متحشرش مناخيرك في اللي مالكش فيه".